{"id":7003,"date":"2018-08-01T08:21:00","date_gmt":"2018-08-01T00:21:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=7003"},"modified":"2018-08-04T10:34:41","modified_gmt":"2018-08-04T02:34:41","slug":"printer-fail-analysis","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2018\/08\/printer-fail-analysis\/","title":{"rendered":"[\u6848\u4f8b]\u65b0\u7522\u54c1\u4e0d\u826f\u5206\u6790\u7814\u767c\u600e\u9ebc\u53ef\u4ee5\u6253\u8ff7\u7cca\u4ed7\uff1f\u7522\u54c1\u5370\u5b57\u4e0d\u826f\u5206\u6790"},"content":{"rendered":"<p align=\"justify\"><font size=\"4\"><img loading=\"lazy\" decoding=\"async\" title=\"Printer_out_of_paper\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"Printer_out_of_paper\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/Printer_out_of_paper.jpg\" width=\"580\" height=\"326\" \/>\u9019\u5e7e\u5929\u570b\u5916\u7814\u767c(RD)\u55ae\u4f4d\u5bc4\u4e86\u4e00\u53f0\u5217\u5370\u4e0d\u826f\u7684\u8a66\u7522\u54c1\u7d66\u5de5\u4f5c\u718a\u5206\u6790\uff0c\u56e0\u70ba\u4ed6\u5011\u7684\u5de5\u7a0b\u5e2b\u53ca\u6280\u8853\u4eba\u54e1\u6aa2\u67e5\u4e86\u96fb\u8def\u677f\u4e0a\u7684\u76f8\u95dc\u7dda\u8def\u53ca\u96f6\u4ef6\uff0c\u4e26\u66f4\u63db\u4e86\u4e00\u9846\u65b0\u7684\u6253\u5370\u982d(Printer head)\uff0c\u6700\u7d42\u4ecd\u7136\u627e\u4e0d\u5230\u4e0d\u826f\u539f\u56e0\u51fa\u5728\u54ea\u88e1\uff0c\u7136\u5f8c\u5c31\u628a\u77db\u982d\u6307\u5411\u4e86\u4e00\u9846QFN\u5c01\u88dd\u7684EMI\u6ffe\u6ce2\u5668\uff0c\u4ed6\u5011\u5f37\u70c8\u4e14\u9ad8\u5ea6\u61f7\u7591\u9019\u9846QFN\u7684\u5403\u932b\u53ef\u80fd\u6709\u554f\u984c\uff0c\u56e0\u70ba\u4ed6\u5011\u5728\u986f\u5fae\u93e1\u4e0b\u89c0\u5bdf\u5230\u9019\u9846QFN\u7684\u5074\u9762\u5403\u932b\u72c0\u6cc1\u4e0d\u4f73\uff0c\u56e0\u70ba\u5074\u9762\u6c92\u6709\u5403\u932b\uff0c\u56e0\u6b64\u8a8d\u70ba\u5176\u53ef\u80fd\u6709<a href=\"\/\/m.letratesoro.com\/2017\/04\/wetting-principle\/\" target=\"_blank\">de-wetting\uff08\u7e2e\u932b\uff09\u6216non-wetting\uff08\u5047\u3001\u51b7\u710a\u3001\u4e0d\u5403\u932b\uff09<\/a>\u7684\u4e0d\u826f\uff0c\u5e0c\u671b\u5de5\u4f5c\u718a\u53ef\u4ee5\u628a\u7522\u54c1\u9001\u56de\u7d66SMT\u5de5\u5ee0\u5206\u6790\u5176\u710a\u932b\u54c1\u8cea\u3002<\/font><\/p>\n<p align=\"center\"><font style=\"background-color: rgb(255, 255, 0);\" size=\"5\"><strong>\u770b\u500c\u5011\u5f9e\u4e0a\u9762\u7684\u63cf\u8ff0\u4e2d\u6709\u6c92\u6709\u767c\u73fe\u5230\u4ec0\u9ebc\u91cd\u5927\u554f\u984c\uff1f<\/strong><\/font><\/p>\n<p><!--more--><\/p>\n<p align=\"justify\"><font size=\"4\"><strong><font color=\"#0000ff\">\u7b2c\u4e00\u500b\u767c\u73fe<\/font><\/strong>\uff1a\u600e\u9ebc\u73fe\u5728\u7684RD\u8b8a\u5f97\u9019\u9ebc\u597d\u6df7\u4e86\uff0c\u7522\u54c1\u554f\u984c\u7121\u6cd5Debug\u5c31\u4e1f\u7d66\u5de5\u5ee0\u4f86\u5206\u6790\uff0c\u800c\u4ed6\u5011\u7684\u7406\u7531\u662fQFN\u5c3a\u5bf8\u5f88\u5c0f\uff0c\u800c\u4e14\u5176\u65c1\u908a\u9084\u6709\u5176\u4ed6\u9130\u8fd1\u7684\u96f6\u4ef6\uff0c\u4ed6\u5011\u8aaa\u56e0\u70ba\u8a2d\u5099\u4e0d\u8db3\uff0c\u6240\u4ee5\u7121\u6cd5\u66f4\u63db\u9019\u9846\u8f03\u5c0f\u7684QFN\u96f6\u4ef6\uff0c\u5e0c\u671b\u5de5\u5ee0\u53ef\u4ee5\u8981\u6c42\u5de5\u5ee0\u5e6b\u5fd9\u66f4\u63db\u9019\u9846QFN\u4ee5\u78ba\u8a8d\u554f\u984c\u9ede\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u771f\u4e0d\u77e5\u7576\u521d\u5de5\u5ee0\u53cd\u61c9\u76f8\u9130\u96f6\u4ef6\u592a\u8fd1\u6642\uff0c\u662f\u8ab0\u5728\u5805\u6301\u6c92\u6709\u7a7a\u9593\u7684\uff1f\u5404\u6709\u5404\u7684\u58d3\u529b\u5427\uff01\u4e0d\u7ba1\u5fc3\u7406\u600e\u9ebc\u4e0d\u723d\uff0c\u8a72\u5e6b\u5fd9\u7684\u9084\u662f\u5f97\u5e6b\u5fd9\u3002\u9019\u5c31\u662f\u300c\u4eba\u5728\u6c5f\u6e56\u8eab\u4e0d\u7531\u5df1\u300d\uff1f<\/font><\/p>\n<p align=\"justify\"><font size=\"4\"><strong><font color=\"#0000ff\">\u7b2c\u4e8c\u500b\u767c\u73fe<\/font><\/strong>\uff1a\u95dc\u65bcQFN\u7684\u5403\u932b\u54c1\u8cea\u8a72\u5982\u4f55\u5224\u65b7\u5176\u597d\u58de\uff1f\u771f\u7684\u53ef\u4ee5\u50c5\u5f9eQFN\u7684\u5074\u9762\u722c\u932b\u72c0\u6cc1\u4f86\u5224\u65b7\u5176\u5403\u932b\u54c1\u8cea\uff1f<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">QFN (Quad Flat No leads\uff0c\u56db\u65b9\u5e73\u9762\u7121\u5f15\u8173\u5c01\u88dd) 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align=\"justify\"><font size=\"4\">\u7e3d\u4e4b\uff0c<font style=\"background-color: rgb(255, 255, 0);\">\u5e02\u9762\u4e0a\u7d55\u5927\u90e8\u5206QFN\u7522\u54c1\u7684\u5074\u9762\u710a\u9ede\u90fd\u662f<strong><font color=\"#0000ff\">\u9732\u9285<\/font><\/strong>\u7684<\/font>\uff0c\u9285\u9762\u57fa\u672c\u4e0a\u53ea\u8981\u66b4\u9732\u5728\u5927\u6c23\u74b0\u5883\u4e0b\u5f88\u5feb\u5c31\u6703\u767c\u751f\u6c27\u5316\uff0c\u4e26\u9020\u6210\u62d2\u710a\u7684\u554f\u984c\uff0c\u65e2\u4f7f\u6709\u6eab\u6fd5\u5ea6\u7ba1\u63a7\u7684\u74b0\u5883\u4e5f\u6703\u6c27\u5316\uff0c\u53ea\u662f\u6c27\u5316\u901f\u5ea6\u8f03\u6162\u3002\u6240\u4ee5\u3010IPC-A-610D \u898f\u7bc4\u3011\u4e2d\u5c0dQFN\u5074\u908a\u710a\u9ede\u5403\u932b\u7684\u5141\u6536\u6a19\u6e96\u5176\u5be6\u898f\u5b9a\u5f97\u76f8\u7576\u5bec\u9b06\u3002\u57fa\u672c\u4e0a\u6c92\u6709\u8981\u6c42\u4e00\u5b9a\u8981\u5f62\u6210\u5403\u932b\u5f27\u5ea6(Fillet)\uff0c\u800c\u300cQFN\u722c\u932b\u9ad8\u5ea6\u300d\u5247\u662f\u7559\u7d66\u8a2d\u8a08\u81ea\u5df1\u6c7a\u5b9a\u3002<\/font><\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" title=\"IPC-A-610D_QFN\u5403\u932b\u6a19\u6e96\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"IPC-A-610D_QFN\u5403\u932b\u6a19\u6e96\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/IPC-A-610D_QFN%E5%90%83%E9%8C%AB%E6%A8%99%E6%BA%96.png\" width=\"450\" height=\"283\" \/> <\/p>\n<style type=\"text\/css\">.style1 { color: black; font-size: 10.0pt; font-weight: 700; font-style: normal; text-decoration: none; font-family: \"Arial Unicode MS\", sans-serif; text-align: center; vertical-align: middle; white-space: nowrap; border-left-style: none; border-left-color: inherit; border-left-width: medium; border-right-style: none; border-right-color: inherit; border-right-width: medium; border-top-style: none; border-top-color: inherit; border-top-width: medium; border-bottom: .5pt solid windowtext; padding-left: 1px; padding-right: 1px; padding-top: 1px; } .style2 { color: blue; font-size: 12.0pt; font-weight: 700; font-style: normal; text-decoration: none; font-family: arial, sans-serif; text-align: center; vertical-align: middle; white-space: nowrap; border: .5pt solid windowtext; padding-left: 1px; padding-right: 1px; padding-top: 1px; } .style3 { color: black; font-size: 12.0pt; font-weight: 400; font-style: normal; text-decoration: none; font-family: calibri, sans-serif; text-align: general; vertical-align: middle; white-space: nowrap; border: .5pt solid windowtext; padding-left: 1px; padding-right: 1px; padding-top: 1px; } .style4 { color: black; font-size: 12.0pt; font-weight: 400; font-style: normal; text-decoration: none; font-family: calibri, sans-serif; text-align: center; vertical-align: middle; white-space: nowrap; border: .5pt solid windowtext; padding-left: 1px; padding-right: 1px; padding-top: 1px; } .style5 { color: black; font-size: 12.0pt; font-weight: 400; font-style: normal; text-decoration: none; font-family: calibri, sans-serif; text-align: general; vertical-align: middle; white-space: normal; border: .5pt solid windowtext; padding-left: 1px; padding-right: 1px; padding-top: 1px; } .style6 { color: black; font-size: 12.0pt; font-weight: 400; font-style: normal; text-decoration: none; font-family: calibri, sans-serif; text-align: left; vertical-align: middle; white-space: normal; border-style: none; border-color: inherit; border-width: medium; padding-left: 1px; padding-right: 1px; padding-top: 1px; } <\/style>\n<\/p>\n<table style=\"width: 423pt; border-collapse: collapse;\" cellspacing=\"0\" cellpadding=\"0\" width=\"563\" border=\"0\">\n<colgroup>\n<col style=\"width: 168pt; mso-width-source: userset; mso-width-alt: 8192;\" width=\"224\" \/>\n<col style=\"width: 36pt; mso-width-source: userset; mso-width-alt: 1755;\" width=\"48\" \/>\n<col style=\"width: 77pt; mso-width-source: userset; mso-width-alt: 3730;\" width=\"102\" \/>\n<col style=\"width: 53pt; mso-width-source: userset; mso-width-alt: 2560;\" width=\"70\" \/>\n<col style=\"width: 89pt; mso-width-source: userset; mso-width-alt: 4352;\" width=\"119\" \/><\/colgroup>\n<tbody>\n<tr style=\"height: 15pt;\" height=\"20\">\n<td class=\"style1\" style=\"width: 423pt; height: 15pt;\" height=\"20\" width=\"563\" colspan=\"5\"> Table 8-13 Dimensional Criteria &#8211; PQFN (Plastic Quad Flat Pack \u2013 No Leads)<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style2\" style=\"height: 15.75pt;\" height=\"21\"> Feature<\/td>\n<td class=\"style2\">Dim.<\/td>\n<td class=\"style2\">Class 1<\/td>\n<td class=\"style2\">Class 2<\/td>\n<td class=\"style2\">Class 3<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Maximum Side Overhang<\/td>\n<td class=\"style4\">A<\/td>\n<td class=\"style4\">50% W, Note 1<\/td>\n<td class=\"style4\" colspan=\"2\">25% W, Note 1<\/td>\n<\/tr>\n<tr style=\"height: 31.5pt;\" height=\"42\">\n<td class=\"style5\" style=\"width: 168pt; height: 31.5pt;\" height=\"42\" width=\"224\"> Toe Overhang (outside edge of component termination)<\/td>\n<td class=\"style4\">B<\/td>\n<td class=\"style4\" colspan=\"3\">No permitted<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Minimum End Joint Width<\/td>\n<td class=\"style4\">C<\/td>\n<td class=\"style4\">50% W<\/td>\n<td class=\"style4\" colspan=\"2\">75% W<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Minimum Side Joint Length<\/td>\n<td class=\"style4\">D<\/td>\n<td class=\"style4\" colspan=\"3\">Note 4<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Solder Fillet Thickness<\/td>\n<td class=\"style4\">G<\/td>\n<td class=\"style4\" colspan=\"3\">Note 3<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Minimum Toe (End) Fillet Height<\/td>\n<td class=\"style4\">F<\/td>\n<td class=\"style4\" colspan=\"2\">Notes 2, 5<\/td>\n<td class=\"style3\">G +H, Notes 2,5<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Termination Height<\/td>\n<td class=\"style4\">H<\/td>\n<td class=\"style4\" colspan=\"3\">Note 5<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Solder Coverage of Thermal Pad<\/td>\n<td class=\"style4\"><\/td>\n<td class=\"style4\" colspan=\"3\">Note 4<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Land Width<\/td>\n<td class=\"style4\">P<\/td>\n<td class=\"style4\" colspan=\"3\">Note 2<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style3\" style=\"height: 15.75pt;\" height=\"21\"> Termination Width<\/td>\n<td class=\"style4\">W<\/td>\n<td class=\"style4\" colspan=\"3\">Note 2<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style6\" style=\"width: 423pt; height: 15.75pt;\" height=\"21\" width=\"563\" colspan=\"5\"> Note 1. Does not violate minimum electrical clearance.<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style6\" style=\"width: 423pt; height: 15.75pt;\" height=\"21\" width=\"563\" colspan=\"5\"> Note 2. Unspecified parameter or variable in size as determined by design.<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style6\" style=\"width: 423pt; height: 15.75pt;\" height=\"21\" width=\"563\" colspan=\"5\"> Note 3. Wetting is evident.<\/td>\n<\/tr>\n<tr style=\"height: 15.75pt;\" height=\"21\">\n<td class=\"style6\" style=\"width: 423pt; height: 15.75pt;\" height=\"21\" width=\"563\" colspan=\"5\"> Note 4. Not a visually inspectable attribute.<\/td>\n<\/tr>\n<tr style=\"height: 30.75pt; mso-height-source: userset;\" height=\"41\">\n<td class=\"style6\" style=\"width: 423pt; height: 30.75pt;\" height=\"41\" width=\"563\" colspan=\"5\"> Note 5. \u2018\u2018H\u2019\u2019 = height of solderable surface of lead, if present. Some package configurations do not have a continuous solderable surface on the sides and do not require a toe (end) fillet.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p align=\"justify\"><font size=\"4\">\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bcQFN\u710a\u63a5\u54c1\u8cea\u53ef\u4ee5\u53c3\u8003\u3010<a href=\"\/\/m.letratesoro.com\/2010\/11\/qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa\/\" target=\"_blank\">QFN\u5c01\u88dd\u5728SMT\u7684\u710a\u63a5\u54c1\u8cea<\/a>\u3011\u4e00\u6587\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u597d\u5427\uff01\u56de\u5230\u672c\u6587\u7684\u4e3b\u984c\uff0c\u5de5\u4f5c\u718a\u62ff\u5230\u4e0d\u826f\u54c1\u5f8c\uff0c\u4e26\u6c92\u6709\u76f4\u63a5\u9001\u7d66\u53bb\u5de5\u5ee0\u5206\u6790\uff0c\u800c\u662f\u81ea\u5df1\u5148\u4f9d\u64da\u4e0b\u5217\u5e7e\u500b\u6b65\u9a5f\u9032\u884c\u4e86\u5206\u6790\uff0c\u514d\u5f97\u5230\u6642\u5019\u9001\u7d66\u5de5\u5ee0\u5f8c\u8aaa\u710a\u63a5\u53ca\u88fd\u7a0b\u90fd\u6c92\u6709\u554f\u984c\uff0c\u53cd\u800c\u8b8a\u6210\u7f85\u751f\u9580\uff0c\u6700\u8fd1\u5c31\u5e38\u5e38\u78b0\u5230\u9019\u6a23\u7684\u554f\u984c\uff1a<\/font><\/p>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u6b65\u9a5f\u4e00\u3001\u78ba\u8a8d\u4e0d\u826f\u73fe\u8c61(symptom)\u662f\u5426\u8207\u7814\u767c\u63cf\u8ff0\u7684\u554f\u984c\u4e00\u81f4\u3002<\/strong><\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u5982\u679c\u73fe\u8c61\u4e0d\u7b26\u6216\u4e0d\u78ba\u5b9a\uff0c\u5c31\u8981\u8ddf\u5c0d\u65b9\u6e9d\u901a\u518d\u6b21\u78ba\u8a8d\u554f\u984c\u3002\u7576\u521d\u7814\u767c\u53ea\u8aaa\u5370\u8868\u6a5f\u4e0d\u826f\uff0c\u4e26\u6c92\u6709\u8aaa\u660e\u662f\u4f55\u7a2e\u4e0d\u826f\uff0c\u5e7e\u7d93\u78ba\u8a8d\u5f8c\u7814\u767c\u55ae\u4f4d\u8aaa\u4ed6\u5011\u770b\u5230\u7684\u4e0d\u826f\u73fe\u8c61\u70ba\u300c\u6253\u5370\u6a5f\u611f\u61c9\u4e0d\u5230\u7d19\u5f35\u300d\uff0c\u9019\u500b\u8207\u5de5\u4f5c\u718a\u4e00\u958b\u59cb\u767c\u73fe\u7684\u4e0d\u826f\u73fe\u8c61\u4e0d\u4e00\u6a23\uff0c\u9084\u597d\u5de5\u4f5c\u718a\u91cd\u7d44\u5e7e\u6b21\u5f8c\u6709\u8907\u88fd\u51fa\u300c\u6253\u5370\u6a5f\u611f\u61c9\u4e0d\u5230\u7d19\u5f35\u300d\u7684\u4e0d\u826f\u73fe\u8c61\u3002<\/font> <\/p>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u6b65\u9a5f\u4e8c\u3001\u986f\u5fae\u93e1\u4e0b\u89c0\u5bdf\u7814\u767c\u63cf\u8ff0\u7684QFN\u5403\u932b\u73fe\u8c61\u662f\u5426\u4e00\u81f4<\/strong><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u7576\u521d\u5f9eRD\u63d0\u4f9b\u7684\u7167\u7247\u4e0a\u89c0\u5bdf\u5230QFN\u4f3c\u4e4e\u6709\u4e00\u8655\u710a\u76e4\u5403\u932b\u53ef\u80fd\u4e0d\u4f73\uff0c\u9084\u6709\u4e00\u8655\u7591\u4f3c\u6676\u9ad4\u7834\u88c2\uff0c\u4f46\u5be6\u969b\u62ff\u5230\u6a23\u54c1\u89c0\u5bdf\u5f8c\uff0c\u5176\u5403\u932b\u53ca\u7591\u4f3c\u6676\u9ad4\u7834\u88c2\u73fe\u8c61\u537b\u8207\u7576\u521d\u7684\u7167\u7247\u4e0d\u540c\uff0c\u6a23\u54c1\u7684\u5074\u908a\u5403\u932b\u96d6\u7136\u4e0d\u662f\u5f88\u6f02\u4eae\uff0c\u4f46\u5176\u5e95\u90e8\u710a\u76e4\u61c9\u8a72\u90fd\u6709\u5403\u5230\u932b\uff0c\u5982\u679c\u60f3\u8981\u9032\u4e00\u6b65\u78ba\u8a8dQFN\u7684\u5403\u932b\u54c1\u8cea\u5c31\u5fc5\u9808\u62ff\u53bb\u7167X-Ray\uff0c\u6700\u597d\u8981\u6709\u53ef\u4ee5\u50be\u659c\u89d2\u5ea6\u7684X-Ray\u6216\u662f<a href=\"\/\/m.letratesoro.com\/2016\/06\/3d-x-ray-ct\/\" target=\"_blank\">3D CT X-Ray<\/a>\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\"><img loading=\"lazy\" decoding=\"async\" title=\"QFN\u710a\u63a5\u96f6\u4ef6\u6bd4\u8f0301\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"QFN\u710a\u63a5\u96f6\u4ef6\u6bd4\u8f0301\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/QFN%E7%84%8A%E6%8E%A5%E9%9B%B6%E4%BB%B6%E6%AF%94%E8%BC%8301.png\" width=\"580\" height=\"286\" \/><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u5f8c\u4f86\u8ddfRD\u518d\u6b21\u78ba\u8a8d\u5f8c\uff0c\u4ed6\u5011\u8aaa\u70ba\u4e86\u78ba\u8a8d\u554f\u984c\uff0c\u62cd\u5b8c\u4e86\u7167\u7247\u5f8c\u6709\u518d\u52d5\u904e\u71b1\u98a8\u69cd\uff0c\u6240\u4ee5\u5916\u89c0\u7684\u73fe\u8c61\u4e0d\u592a\u4e00\u6a23\u4e86\u3002\u7e3d\u4e4b\uff0c\u76ee\u524d\u770b\u4f86QFN\u7684\u710a\u932b\u521d\u6b65\u5224\u65b7\u61c9\u8a72\u662f\u6c92\u6709\u554f\u984c\u624d\u5c0d\u3002<\/font><\/p>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u6b65\u9a5f\u4e09\u3001\u53d6\u826f\u54c1\u53ca\u4e0d\u826f\u54c1\u6a5f\u53f0\u4e92\u63db\u53ef\u80fd\u6709\u554f\u984c\u96f6\u4ef6\u4e26\u4f9d\u64da\u7d93\u9a57\u5224\u65b7\u6700\u53ef\u80fd\u767c\u751f\u7684\u554f\u984c\u9ede<\/strong><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u5de5\u4f5c\u718a\u524d\u9762\u6709\u63d0\u5230\uff0c\u525b\u63a5\u5230\u4e0d\u826f\u6a23\u54c1\u6642\u767c\u73fe\u5176\u4e0d\u826f\u73fe\u8c61\u8207RD\u63cf\u8ff0\u7684\u4e0d\u4e00\u81f4\uff0c\u5de5\u4f5c\u718a\u6700\u5148\u767c\u73fe\u7684\u554f\u984c\u662f\u300c\u5370\u5b57\u4e0d\u6e05\u6670\u300d\uff0c\u8207RD\u53cd\u994b\u300c\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\u300d\u4e0d\u4e00\u81f4\uff0c\u7d93\u904e\u5e7e\u6b21\u53cd\u8986\u7d44\u88dd\u5f8c\u7d42\u65bc\u8907\u88fd\u51fa\u300c\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\u300d\u7684\u4e0d\u826f\u73fe\u8c61\uff0c\u800c\u4e14\u53ef\u4ee5\u91cd\u8907\u8907\u88fd\u51fa\u4e0d\u826f\u73fe\u8c61\u3002\uff08\u5206\u6790\u4e0d\u826f\u54c1\u6642\u6700\u6015\u51fa\u73fe\u9593\u6b47\u6027\u554f\u984c\uff5e\uff09<\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u518d\u4f86\u5c31\u662f\u53d6\u4e00\u5370\u5b57\u6b63\u5e38\u7684\u6a5f\u53f0\u505a\u8a18\u865f\uff0c\u8207\u4e0d\u826f\u6a5f\u53f0\u4e92\u63db\u5370\u5b57\u982d\uff0c\u7d50\u679c\u767c\u73fe\u300c\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\u300d\u7684\u554f\u984c\u8ddf\u96a8\u8457\u300c\u58de\u677f(bad PCBA)\u300d\uff0c\u800c\u5370\u5b57\u982d\u5247\u6c92\u6709\u554f\u984c\uff0c\u65bc\u662f\u5c07\u554f\u984c\u6536\u6582\u5728\u5df2\u7d93\u7d44\u88dd\u597d\u7684\u96fb\u8def\u677f\u4e0a\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u56e0\u70ba\u5728\u91cd\u8907\u7d44\u88dd\u7684\u904e\u7a0b\u7576\u4e2d\uff0c\u5de5\u4f5c\u718a\u767c\u73fe\u6709\u6642\u5019\u53ef\u4ee5\u5075\u6e2c\u5230\u7d19\u5f35\u3001\u6709\u6642\u5019\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\uff0c\u4f9d\u64da\u904e\u5f80\u7684\u7d93\u9a57\u5224\u65b7\uff0c<font style=\"background-color: rgb(255, 255, 0);\">\u9019\u61c9\u8a72\u662f\u96fb\u5b50\u7dda\u8def\u4e0a\u4ec0\u9ebc\u5730\u65b9\u6216\u96f6\u4ef6\u6709\u9593\u6b47\u6027\u63a5\u89f8\u4e0d\u826f<\/font>\u6240\u9020\u6210\u7684\u73fe\u8c61\uff0c\u67e5\u770b\u5370\u5b57\u529f\u80fd\u7684\u76f8\u95dc\u7dda\u8def\u5716\u5f8c\uff0c\u6392\u67e5QFN\u96f6\u4ef6\u53ca\u5176\u4ed6\u76f8\u95dc\u7dda\u8def\u4e0a\u7684\u96f6\u4ef6\u90fd\u6c92\u6709\u660e\u986f\u7684\u710a\u63a5\u4e0d\u826f\uff08\u96f6\u4ef6\u7aef\u9ede\u710a\u63a5\u8655\u67e5\u770b\u6709\u5426\u5f62\u6210\u826f\u597d\u7684\u5f27\u5f62\u710a\u932b\uff09\uff0c\u6700\u5f8c\u5c07\u554f\u984c\u9396\u5b9a\u5728\u8207\u9023\u63a5\u6253\u5370\u6a5f\u7684\u8edf\u6392\u7dda\u9023\u63a5\u5668 (FPC connector)\u4e0a\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\"><img loading=\"lazy\" decoding=\"async\" title=\"FPC_connector_spring_deformation011\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"FPC_connector_spring_deformation011\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/FPC_connector_spring_deformation011.png\" width=\"580\" height=\"300\" \/><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u5de5\u4f5c\u718a\u9996\u5148\u78ba\u8a8d\u8edf\u6392\u7dda\u7684\u9023\u63a5\u5668\u710a\u63a5\u6c92\u6709\u554f\u984c\uff0c\u63a5\u8457\u518d\u6aa2\u67e5\u6253\u5370\u6a5f\u7684\u8edf\u6392\u7dda\u4e0a\u91d1\u624b\u6307\u58d3\u75d5\u4e5f\u90fd\u6b63\u5e38\uff0c\u9019\u4e0b\u50b7\u8166\u7b4b\u4e86\uff5e\u4e0d\u6b7b\u5fc3\uff0c\u5728\u986f\u5fae\u93e1\u4e0b\u89c0\u5bdf\u672a\u63d2\u8edf\u6392\u7dda\u6642\u9023\u63a5\u5668\u7684\u72c0\u614b\u4e5f\u6c92\u6709\u592a\u5927\u7684\u767c\u73fe\uff0c\u518d\u89c0\u5bdf\u8edf\u6392\u7dda\u63d2\u5165\u9023\u63a5\u5668\u5f8c\u7684\u72c0\u614b\uff0c\u8cd3\u679c\uff01\u6700\u5f8c\u7d42\u65bc\u767c\u73fe\u8edf\u6392\u7dda\u63d2\u5165\u9023\u63a5\u5668\u5f8c\uff0c\u9023\u63a5\u5668\u4e0a\u7684\u63a5\u89f8\u7c27\u7247\u6392\u5217\u6709\u9ad8\u4f4e\u4e0d\u4e00\u81f4\u7684\u73fe\u8c61\uff0c\u62ff\u4e09\u7528\u96fb\u9336\u91cf\u6e2c\uff08\u9084\u597d\u53ef\u4ee5\u76f4\u63a5\u91cf\u6e2c\uff09\u5f8c\u767c\u73fe\u5176\u7c27\u7247\u6c89\u5f97\u6bd4\u8f03\u6df1\u5165\u9023\u63a5\u5668\u5851\u81a0\u7684\u4f4d\u7f6e\u6709\u63a5\u89f8\u4e0d\u826f\u7684\u73fe\u8c61\uff08\u963b\u6297\u8b8a\u5927\u6216\u76f4\u63a5\u7d66\u5b83open\uff09\uff0c\u9019\u6a23\u4e3b\u56e0\uff08Root cause\uff09\u57fa\u672c\u4e0a\u5c31\u78ba\u5b9a\u4e0b\u4f86\u4e86\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\"><img loading=\"lazy\" decoding=\"async\" title=\"FPC_connector_spring_deformation012\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"FPC_connector_spring_deformation012\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/FPC_connector_spring_deformation012.png\" width=\"580\" height=\"300\" \/><\/font><\/p>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u6b65\u9a5f\u56db\u3001\u78ba\u8a8d\u554f\u984c<\/strong><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u5617\u8a66\u5728\u8edf\u6392\u7dda\u7684\u88dc\u5f37\u677f\u8cbc\u4e0a0.05mm\u539a\u5ea6\u7684Kapton-tape\u4ee5\u52a0\u5f37\u91d1\u624b\u6307\u8207\u5f48\u7247\u7684\u63a5\u89f8\u529b\uff0c\u518d\u63d2\u5165\u9023\u63a5\u5668\u5f8c\u7d44\u88dd\u8d77\u4f86\u6e2c\u8a66\uff0c\u679c\u7136\u300c\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\u300d\u7684\u554f\u984c\u5c31\u89e3\u6c7a\u4e86\uff0c\u4f46\u662f\u4e4b\u524d\u5370\u5b57\u6de1\u7684\u554f\u984c\u9084\u662f\u5b58\u5728\uff0c\u61c9\u8a72\u662f\u589e\u52a0\u8edf\u6392\u7dda\u539a\u5ea6\u5f8c\u4ecd\u7136\u7121\u6cd5\u5b8c\u5168\u89e3\u6c7a\u63a5\u89f8\u7684\u554f\u984c\uff0c\u5c07Kapton-tape\u79fb\u9664\uff0c\u518d\u91cd\u65b0\u7d44\u88dd\u4e00\u6b21\u300c\u5075\u6e2c\u4e0d\u5230\u7d19\u5f35\u300d\u53c8\u91cd\u65b0\u51fa\u73fe\uff0c\u8b49\u660e\u9023\u63a5\u5668\u63a5\u89f8\u4e0d\u826f\u5c31\u662f\u554f\u984c\u7684\u4e3b\u56e0\u3002<\/font><\/p>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u6b65\u9a5f\u4e94\u3001\u5c07\u554f\u984c\u53cd\u994b\u7d66\u5de5\u5ee0\u53ca\u9023\u63a5\u5668\u5ee0\u5546\u89e3\u6c7a<\/strong><\/font><\/p>\n<p align=\"justify\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u5269\u4e0b\u7684\u5de5\u4f5c\u5c31\u7c21\u55ae\u4e86\uff0c\u5c07\u4e0d\u826f\u73fe\u8c61\u53cd\u994b\u7d66SMT\u5de5\u5ee0\u6ce8\u610f\uff0c\u4e26\u4e14\u901a\u77e5\u9023\u63a5\u5668\u5ee0\u5546\u78ba\u8a8d\u554f\u984c\u4e26\u52a0\u4ee5\u6539\u5584\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u679c\u554f\u984c\u56b4\u91cd\uff0c\u53ef\u80fd\u6703\u8981\u6c42\u5ee0\u5546\u56de\u6536\u9023\u63a5\u5668\uff0c\u66f4\u56b4\u91cd\u7684\u8a71\u53ef\u80fd\u9700\u8981\u62db\u56de\u7522\u54c1\u66f4\u63db\u9023\u63a5\u5668\u3002<\/font><\/p>\n<hr \/>\n<p><font size=\"4\">\u5ef6\u4f38\u95b1\u8b80\uff1a      <br \/><\/font><a href=\"\/2017\/06\/b2b-connector-floating\/\"><font size=\"4\">\u677f\u5c0d\u677f\u9023\u63a5\u5668SMT\u5f8c\u6d6e\u9ad8\u7a7a\u710a\u5c45\u7136\u662f\u56e0\u70ba\u9019\u500b\uff1f<\/font><\/a>     <br \/><a href=\"\/2016\/04\/fpc-design-dfx\/\"><font size=\"4\">FPC\u9023\u63a5PCB\u61c9\u8a72\u5982\u4f55\u8a2d\u8a08\u53ef\u4ee5\u66f4\u7b26\u5408\u5de5\u5ee0\u7d44\u88dd\u9700\u6c42(DFx)<\/font><\/a>     <br \/><a href=\"\/2011\/05\/right-angle-connector-actuator-design-notices\/\"><font size=\"4\">\u6380\u84cb\u5f0f\u9023\u63a5\u5668\u7684\u6d3b\u52d5\u7247\u8a2d\u8a08\u6ce8\u610f\u4e8b\u9805(right angle connector)<\/font><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9019\u5e7e\u5929\u570b\u5916\u7814\u767c(RD)\u55ae\u4f4d\u5bc4\u4e86\u4e00\u53f0\u5217\u5370\u4e0d\u826f\u7684\u8a66\u7522 &#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45,113,22],"tags":[179],"aioseo_notices":[],"views":10753,"_links":{"self":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/7003"}],"collection":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/comments?post=7003"}],"version-history":[{"count":0,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/7003\/revisions"}],"wp:attachment":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/media?parent=7003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/categories?post=7003"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/tags?post=7003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}