{"id":695,"date":"2010-11-15T14:59:39","date_gmt":"2010-11-15T06:59:39","guid":{"rendered":"\/\/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\/"},"modified":"2024-02-17T17:08:09","modified_gmt":"2024-02-17T09:08:09","slug":"qfn%e5%b0%81%e8%a3%9d%e7%9a%84%e7%84%8a%e6%8e%a5%e5%93%81%e8%b3%aa","status":"publish","type":"post","link":"\/\/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\/","title":{"rendered":"\u8a0e\u8ad6QFN\u5c01\u88dd\u5728SMT\u7d44\u88dd\u710a\u63a5\u7684\u54c1\u8cea\u5141\u6536\u6a19\u6e96"},"content":{"rendered":"<p align=\"justify\"><font size=\"4\"><img decoding=\"async\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/QFN_Plating.jpg\" \/>QFN (Quad Flat No leads\uff0c\u56db\u65b9\u5e73\u9762\u7121\u5f15\u8173\u5c01\u88dd)\u5728\u73fe\u4eca\u96fb\u5b50\u696d\u754c\u7684IC\u5c01\u88dd\u7576\u4e2d\u4f3c\u4e4e\u6709\u8d8a\u4f86\u8d8a\u666e\u904d\u7684\u8da8\u52e2\uff0cQFN\u7684\u512a\u9ede\u662f\u9ad4\u7a4d\u5c0f\uff0c\u8db3\u4ee5\u5ab2\u7f8eCSP(Chip Scale Package)\u5c01\u88dd\uff0c\u800c\u4e14\u6210\u672c\u4e5f\u76f8\u5c0d\u4fbf\u5b9c\uff0cIC\u7684\u751f\u7522\u88fd\u7a0b\u826f\u7387\u4e5f\u883b\u9ad8\u7684\uff0c\u9084\u80fd\u70ba\u9ad8\u901f\u548c\u96fb\u6e90\u7ba1\u7406\u96fb\u8def\u63d0\u4f9b\u8f03\u4f73\u7684\u5171\u9762\u6027\u4ee5\u53ca\u6563\u71b1\u80fd\u529b\u7b49\u512a\u9ede\u3002\u6b64\u5916\uff0cQFN\u5c01\u88dd\u4e0d\u5fc5\u5f9e\u56db\u5074\u5f15\u51fa\u63a5\u8173\uff0c\u56e0\u6b64\u96fb\u6c23\u6548\u80fd\u66f4\u52dd\u5f15\u7dda\u5c01\u88dd\u5fc5\u9808\u5f9e\u5074\u9762\u5f15\u51fa\u591a\u63a5\u8173\u7684SO\u7b49\u50b3\u7d71\u5c01\u88dd IC\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u76e1\u7ba1\u5f9e\u96f6\u4ef6\u8a2d\u8a08\u7aef\u4f86\u770bQFN\u5c01\u88dd\u6709\u9019\u9ebc\u591a\u7684\u96fb\u6c23\u53ca\u4f7f\u7528\u4e0a\u7684\u512a\u9ede\uff0c\u4f46\u5b83\u537b\u4e5f<span class=\"UNDER2\">\u7d66\u96fb\u8def\u677f\u7d44\u88dd\u5ee0\u5e36\u4f86\u4e0d\u5c11\u7684<strong><font color=\"#ff00ff\">\u710a\u63a5\u54c1\u8cea<\/font><\/strong>\u885d\u64ca<\/span>\uff0c\u56e0\u70ba QFN \u7684\u7121\u5f15\u8173\u8a2d\u8a08\uff0c\u4e00\u822c<span class=\"UNDER2\">\u5f88\u96e3\u5f9e\u5176\u5916\u89c0\u7684\u710a\u932b\u9ede\u4f86\u5224\u65b7\u5176\u710a\u932b\u6027\u662f\u5426\u826f\u597d<\/span>\uff0c\u96d6\u7136 QFN \u7684\u5c01\u88dd\u5074\u9762\u4ecd\u7559\u6709\u710a\u9ede\uff0c\u4f46\u5927\u591a\u6578\u7684IC\u5c01\u88dd\u696d\u8005\u53ea\u662f\u628a\u3010Lead-frame(\u5c0e\u7dda\u67b6)\u3011\u76f4\u63a5\u5207\u65b7\u9732\u51fa\u5176\u5207\u65b7\u9762\uff0c\u4e26\u6c92\u6709\u518d\u52a0\u4ee5\u96fb\u934d\u8655\u7406\uff0c\u9019\u6a23\u7684QFN\u5728\u5074\u9762\u7684\u5403\u932b\u5c31\u6703\u986f\u5f97\u4e0d\u592a\u5bb9\u6613\uff0c\u56e0\u70ba\u5207\u65b7\u9762\u76f4\u63a5\u9732\u9285\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u4e5f\u5c31\u662f\u8aaa\uff0c\u65b0\u9bae\u7684QFN\u6216\u8a31\u5728\u5074\u908a\u9732\u9285\u8655\u53ef\u4ee5\u5403\u932b\uff0c\u53ef\u662f\u4fdd\u5b58\u4e00\u6bb5\u6642\u9593\u5f8c\u7684QFN\u5074\u908a\u5207\u65b7\u9762\u9732\u9285\u8655\u5c31\u5bb9\u6613\u6c27\u5316\uff0c\u6c27\u5316\u5f8c\u7684\u5074\u9762\u8981\u518d\u4e0a\u932b\u5c31\u6709\u9ede\u56f0\u96e3\u4e86\u3002 <\/font><\/p>\n<p><!--more--><\/p>\n<p><font size=\"4\">\u25bc QFN \u7684\u5074\u9762\u710a\u9ede\u70ba\u5c0e\u7dda\u67b6(lead frame)\u7684\u76f4\u63a5\u5207\u65b7\u9762\uff0c\u5927\u591a\u6578\u7684QFN\u4e26\u4e0d\u6703\u518d\u505a\u96fb\u934d\u8655\u7406\u800c\u76f4\u63a5\u9732\u9285\u3002 <\/font>    <br \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_side_cut_off01\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_side_cut_off01\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_side_cut_off01.jpg\" width=\"200\" height=\"150\" \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_side_cut_off02\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_side_cut_off02\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_side_cut_off02.jpg\" width=\"200\" height=\"72\" \/><\/p>\n<h2>\n<p><strong><font color=\"#ffffff\" size=\"5\" face=\"\u6a19\u6977\u9ad4\"><span style=\"background-color: rgb(51, 153, 255);\">QFN \u5403\u932b\u6a19\u6e96<\/span><\/font><\/strong><\/p>\n<\/h2>\n<p align=\"justify\"><font size=\"4\">\u5176\u5be6\u5728 IPC-A-610<font style=\"background-color: rgb(255, 255, 0);\">D<\/font>, Section 8.2.13 Plastic Quad Flat Pack No Leads (PQFN) \u7684\u898f\u7bc4\u4e2d\uff0c\u4e26\u672a\u660e\u78ba\u5b9a\u7fa9 QFN \u7684\u5074\u908a\u5403\u932b\u4e00\u5b9a\u8981\u6709\u5e73\u6ed1\u7684\u5713\u5f27\u5f62\u66f2\u7dda\u51fa\u73fe\u3002<\/font><\/p>\n<blockquote>\n<p align=\"justify\"><font color=\"#f79646\" size=\"4\">There are some package configurations that have no toe exposed or do not have a continuous solderable surface on the exposed toe on the exterior of the package and a toe fillet will not form.<\/font><\/p>\n<\/blockquote>\n<p align=\"justify\"><font size=\"4\">\u4e5f\u5c31\u662f\u8aaaQFN\u7684\u710a\u63a5\u5176\u5be6\u53ef\u4ee5\u4e0d\u7528\u7ba1\u5074\u908a\u7684\u710a\u63a5\u72c0\u6cc1\uff0c\u800c\u53ea\u8981\u78ba\u4fddQFN\u710a\u9ede\u5e95\u90e8\u53ca\u6b63\u5e95\u90e8\u7684\u6563\u71b1\u7247\u4f4d\u7f6e\u771f\u6b63\u6709\u5403\u5230\u932b\u5c31\u53ef\u4ee5\u4e86\u3002QFN\u5e95\u90e8\u710a\u9ede\u7684\u5403\u932b\u5176\u5be6\u53ef\u4ee5\u5c07\u4e4b\u60f3\u50cf\u6210BGA\uff0c\u6240\u4ee5\u5efa\u8b70\u61c9\u8a72\u53ef\u4ee5\u53c3\u8003\u3010IPC-A-610D, Section 8.2.12 Plastic BGA\u3011\u7684\u6a19\u6e96\uff0c\u81f3\u65bc\u4e2d\u9593\u63a5\u5730\u710a\u588a\u7684\u5403\u932b\u53ef\u80fd\u5f97\u8996\u5404\u5bb6\u7684\u8a2d\u8a08\u800c\u5b9a\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\"><strong><font color=\"#0000ff\">2019\/10\/10 update:<\/font><\/strong>       <br \/>\u5927\u6982\u662f\u5927\u5bb6\u5c0dQFN\u7684\u710a\u932b\u6a19\u6e96\u6709\u592a\u591a\u7684\u722d\u8b70\u4e86\uff0c\u6240\u4ee5IPC-A-610E\u53ca610F\u7684\u7248\u672c\u53cd\u800c\u628a\u9019\u500bPQFN\u7ae0\u7bc0\u5f9e\u898f\u7bc4\u4e2d\u7d66\u79fb\u9664\u4e86\uff0c\u4f46\u662f\u6539\u6210 BTC (Bottom Termination Components\uff0c\u5e95\u90e8\u7aef\u5b50)\uff0c\u65b0\u898f\u683c\u4e2d\u6709\u63d0\u5230QFN-EP\u9069\u7528BTC\uff0c\u800c\u4e14\u898f\u5b9a\u4e2d\u4e26\u6c92\u6709\u8981\u6c42\u5074\u908a\u710a\u9ede\u7684\u722c\u932b\u9ad8\u5ea6(H)\uff0c\u56e0\u70ba\u4e00\u822c\u7684BTC\u96f6\u4ef6\u662f\u6c92\u6709\u5074\u908a\u710a\u9ede\u8a2d\u8a08\u7684\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u800c\u9019\u500b\u65b0\u898f\u5b9a\u4f3c\u4e4e\u9084\u662f\u7121\u6cd5\u8aaa\u670d\u5927\u90e8\u5206\u5ba2\u6236\u5c0dQFN\u710a\u932b\u54c1\u8cea\u7684\u7591\u616e\uff01 <\/font><\/p>\n<p align=\"justify\"><font size=\"4\"><img decoding=\"async\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2019\/10\/IPC-BTC01.png\" \/><\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u6240\u4ee5\u6709\u4e9b\u4eba\u5c31\u60f3\u62ff\u3010Castellated terminations(\u57ce\u5821\u578b\u7aef\u5b50)\u3011\u9019\u500b\u7ae0\u7bc0\u7684\u6700\u5c0f\u586b\u932b(\u722c\u932b)\u9ad8\u5ea625\uff05(Class II)\u4f86\u5957\u7528\u5230QFN\u7684\u5074\u908a\u710a\u9ede\uff0c\u4f46\u662f\u5982\u679c\u7d30\u8b80IPC\u6703\u767c\u73feIPC\u7684\u57ce\u5821\u578b\u7aef\u5b50\u898f\u5b9a\u5c31\u662f\u7d66\u90a3\u4e9b\u5074\u908a\u710a\u9ede\u6709\u8868\u9762\u8655\u7406(\u96fb\u934d)\u7684\u96f6\u4ef6\u4f7f\u7528\u7684\uff0c\u800c\u4e0d\u50cf\u662f\u7d66QFN\u9019\u985e\u5074\u908a\u710a\u9ede\u6c92\u6709\u8868\u9762\u8655\u7406\u7684\u96f6\u4ef6\u4f7f\u7528\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\"><img loading=\"lazy\" decoding=\"async\" title=\"IPC-Castellated01\" style=\"border: 0px currentcolor; border-image: none; display: inline; background-image: none;\" border=\"0\" alt=\"IPC-Castellated01\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2019\/10\/IPC-Castellated01.png\" width=\"590\" height=\"245\" \/><\/font><\/p>\n<p align=\"justify\"><font size=\"4\"><font size=\"4\"><font size=\"4\"><font size=\"4\">\u6240\u4ee5\uff0c\u81f3\u4eca\u70ba\u6b62\u4e00\u822cQFN\u7684\u5074\u908a\u710a\u9ede\u4ecd\u7136\u5b58\u5728\u4e9b\u8a31\u7684\u722d\u8b70\u3002\u56e0\u70ba\u5982\u679c\u7121\u6cd5\u4f7f\u7528AOI\u6216Visual\u4f86\u6aa2\u67e5\u5176\u710a\u9ede\u597d\u58de\uff0c\u5c31\u7121\u6cd5100%\u78ba\u8a8d\u710a\u932b\u54c1\u8cea\u7684\u597d\u58de\uff0c\u5c24\u5176\u662f\u6709\u5b89\u5168\u8003\u616e\u7684\u7522\u696d\uff0c\u6240\u4ee5\u6c7d\u8eca\u696d\u6b63\u5728\u63a8\u52d5\u300c\u5074\u908a\u53ef\u710a\u7684QFN\u300d\u5c01\u88dd\uff0d\u53c3\u8003\u672c\u6587\u6700\u4e0b\u65b9\u7684\u8aaa\u660e\uff1a<a href=\"#wettable-flank-plated-QFN\">\u5074\u9762\u53ef\u710a\u5f0f\u968e\u68af\u710a\u9ede\u7684QFN\u5c01\u88dd\uff08wettable flank-plated QFN\uff09<\/a>\uff0c\u9019\u6a23\u5c31\u53ef\u4ee5\u4f7f\u7528AOI\u4f86\u6aa2\u67e5QFN\u7684\u710a\u63a5\u54c1\u8cea\u4e86\u3002<\/font><\/font><\/font><\/font><\/p>\n<p><font size=\"4\"><font size=\"4\"><font size=\"4\"><font size=\"3\"><font size=\"4\">\u25bc QFN\u5074\u908a\u710a\u9ede\u5403\u932b\u96d6\u7136\u4e0d\u597d\uff0c\u4f46\u56e0\u70ba\u5176\u5e95\u9762\u5403\u932b\u826f\u597d\uff0c\u6240\u4ee5\u96fb\u6c23\u7279\u6027\u4ecd\u7136\u826f\u597d\u3002 <\/font>            <br \/><\/font><img loading=\"lazy\" decoding=\"async\" title=\"QFN_soldering02\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_soldering02\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_soldering02.jpg\" width=\"250\" height=\"187\" \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_soldering01\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_soldering01\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_soldering01.jpg\" width=\"250\" height=\"188\" \/> <img loading=\"lazy\" decoding=\"async\" title=\"QFN_side_cut_off04\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_side_cut_off04\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_side_cut_off04.jpg\" width=\"250\" height=\"187\" \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_side_cut_off03\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_side_cut_off03\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_side_cut_off03.jpg\" width=\"250\" height=\"188\" \/><\/font><\/font><\/font><\/p>\n<p><font size=\"3\"><font size=\"4\">\u25bc QFN\u5074\u908a\u710a\u8173\u5403\u932b\u826f\u597d\u3002<\/font>       <br \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_soldering_good02\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_soldering_good02\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_soldering_good02.jpg\" width=\"250\" height=\"188\" \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_soldering_good01\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_soldering_good01\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_soldering_good01.jpg\" width=\"250\" height=\"188\" \/><\/font><\/p>\n<h4>\n<p><strong><font color=\"#ffffff\" size=\"5\" face=\"\u6a19\u6977\u9ad4\"><span style=\"background-color: rgb(51, 153, 255);\">QFN \u710a\u932b\u6027\u6aa2\u67e5\u53ca\u6e2c\u8a66<\/span><\/font><\/strong><\/p>\n<\/h4>\n<p align=\"justify\"><font size=\"4\">\u5c31\u5982\u540cBGA\u7684\u710a\u932b\u6aa2\u67e5\u6a19\u6e96\uff0c\u76ee\u524dQFN\u5c01\u88dd\u7684\u710a\u932b\u6aa2\u67e5\u9664\u4e86\u4f7f\u7528\u96fb\u6027\u6e2c\u8a66(<a href=\"\/\/m.letratesoro.com\/2015\/01\/ict\/\" rel=\"noopener\" target=\"_blank\">In-Circuit-Test<\/a>\u3001<a href=\"\/\/m.letratesoro.com\/2010\/12\/fvtfct\/\" rel=\"noopener\" target=\"_blank\">Function Verification Test<\/a>) \u4f86\u5075\u6e2c\u5176\u529f\u80fd\u5916\uff0c\u4e00\u822c\u4e5f\u6703\u4f50\u4ee5\u5149\u5b78\u5100\u5668\u6216X-ray\u4f86\u6aa2\u67e5\u5176\u710a\u932b\u7684\u958b\u3001\u77ed\u8def\u7b49\u4e0d\u826f\u73fe\u8c61\u3002\u8001\u5be6\u8aaa X-Ray \u7684\u7b49\u7d1a\u4e0d\u5920\u597d\u7684\u8a71\uff0c\u9084\u771f\u7684\u4e0d\u662f\u5f88\u5bb9\u6613\u6aa2\u67e5\u51fa\u4f86QFN\u7684\u710a\u932b\u554f\u984c\u3002\u5982\u679c\u7121\u8ad6\u5982\u4f55\u9084\u662f\u9700\u8981\u627e\u51fa\u710a\u932b\u6027\u7684\u554f\u984c\uff0c\u6700\u5f8c\u5927\u6982\u53ea\u80fd\u4f7f\u7528<a title=\"PCB\u4e0d\u826f\u5206\u6790\u6642\u61c9\u8a72\u7528\u7d05\u58a8\u6c34\u67d3\u8272\u6216\u5207\u7247\u7684\u512a\u7f3a\u9ede\" href=\"\/\/m.letratesoro.com\/2023\/09\/pcb-cross-section-red-dye-inspection\/\" target=\"_blank\" rel=\"noopener\">\u5207\u7247(Micro-section)<\/a>\u6216<\/font><a href=\"\/\/m.letratesoro.com\/2010\/11\/red-dye-penetration-test\/\"><font size=\"4\">\u7528\u6ef2\u900f\u67d3\u7d05\u8a66\u9a57 (Red Dye Penetration Test)\u67e5\u770bBGA\u710a\u932b<\/font><\/a><font size=\"4\">\u7b49\u7834\u58de\u6027\u5be6\u9a57\u4f86\u6aa2\u67e5\u3002\u88dc\u5145\u8aaa\u660e\uff1a\u73fe\u5728\u6216\u8a31\u53ef\u4ee5\u5229\u7528 \u3010<a title=\"\u30103D CT X-Ray\u3011\u975e\u7834\u58de\u6027\u7acb\u9ad4\u65b7\u5c64\u6383\u63cf\u5206\u6790PCBA\u8207BGA\u4e0d\u826f\" href=\"\/\/m.letratesoro.com\/2016\/06\/3d-x-ray-ct\/\" rel=\"noopener\" target=\"_blank\">3D CT X-Ray<\/a>\u3011\u4f86\u505a\u975e\u7834\u58de\u6027\u6aa2\u67e5\u3002<\/font><\/p>\n<p><font size=\"4\">\u25bc\u9019\u5f35\u5716\u7247\u4f86\u81ea\u7db2\u8def\uff0c\u4f7f\u7528X-Ray\u6aa2\u67e5QFN\u710a\u932b\u3002<\/font>     <br \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_X-ray02\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_X-ray02\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_Xray02.jpg\" width=\"226\" height=\"236\" \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_X-ray01\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_X-ray01\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_Xray01.jpg\" width=\"261\" height=\"236\" \/><\/p>\n<p><font size=\"3\"><font size=\"4\">\u25bc\u9019\u5f35\u5716\u7247\u4f86\u81ea\u7db2\u8def\uff0c\u4f7f\u7528 X-Ray \u6aa2\u67e5 QFN \u710a\u932b\uff0c\u7591\u4f3c\u710a\u63a5\u4e0d\u826f\u3002<\/font>       <br \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_X-ray03\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_X-ray03\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_Xray03.jpg\" width=\"482\" height=\"278\" \/><\/font><\/p>\n<h4>\n<p><strong><font color=\"#ffffff\" size=\"5\" face=\"\u6a19\u6977\u9ad4\"><span style=\"background-color: rgb(51, 153, 255);\">QFN \u7a7a\u710a\u7684\u53ef\u80fd\u89e3\u6c7a\u65b9\u6848<\/span><\/font><\/strong><\/p>\n<\/h4>\n<p align=\"justify\"><font size=\"4\">\u7576\u767c\u73feQFN\u6709\u7a7a\u710a\u6642\u61c9\u8a72\u5148\u6f84\u6e05\u662f\u5426\u70ba<strong><font color=\"#ff00ff\">\u96f6\u4ef6\u6c27\u5316<\/font><\/strong>\u554f\u984c\uff0c\u53ef\u4ee5\u628a\u96f6\u4ef6\u62ff\u53bb\u4f5c\u4e00\u4e0b\u6cbe\u932b\u6027\u5be6\u9a57\u4f86\u4f5c\u78ba\u8a8d\uff0c\u518d\u4f86\u8981<span class=\"UNDER1\">\u5224\u65b7\u662f\u5426\u6709\u56fa\u5b9a\u710a\u8173\u7a7a\u710a\u7684\u554f\u984c<\/span>\uff0c\u4e00\u822c\u63a5\u5730\u8173\u6bd4\u8f03\u5bb9\u6613\u7522\u751f\u7a7a\u710a\uff0c\u53ef\u4ee5\u8003\u616e\u8b8a\u66f4\u96fb\u8def\u677f\u7684\u4f48\u7dda\u8a2d\u8a08\uff0c\u5728\u96fb\u8def\u677f\u7684\u7dda\u8def(trace)\u4e0a\u589e\u52a0<\/font><a href=\"\/\/m.letratesoro.com\/2013\/05\/thermal-relief-pad\/\" rel=\"noopener\" target=\"_blank\"><font size=\"4\">\u71b1\u963b(thermal relief)<\/font><\/a><font size=\"4\">\u710a\u588a\u4f86\u6e1b\u5c11\u710a\u8173\u5927\u9762\u7a4d\u76f4\u63a5\u63a5\u5730\u7684\u6bd4\u7387\uff0c\u9019\u6a23\u53ef\u4ee5\u5ef6\u7de9\u71b1\u91cf\u6563\u5931\u7684\u901f\u5ea6\u3002\uff08\u6240\u8b02\u300c\u71b1\u963b\u300d\u5c31\u662f\u628a\u63a5\u5730\u7684\u7dda\u8def\u5bec\u5ea6\u7e2e\u5c0f\uff0c\u8b93\u71b1\u80fd\u4e0d\u8981\u99ac\u4e0a\u50b3\u5c0e\u5230\u63a5\u5730\u7684\u5927\u9285\u7b94\u3002\uff09<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u4e5f\u53ef\u4ee5\u8a66\u8457<strong><font color=\"#ff00ff\">\u8abf\u6574\u7210\u6eab<\/font><\/strong>(reflow profile)\uff0c\u6216\u5c07\u56de\u710a\u66f2\u7dda\u6539\u70ba<a title=\"\u56de\u6d41\u710a\u7684\u7210\u6eab\u66f2\u7dda\u61c9\u8a72\u4f7f\u7528RSS(\u99ac\u978d)\u578b?\u9084\u662fRTS(\u659c\u6607)\u578b?\" href=\"\/\/m.letratesoro.com\/2018\/02\/rss-rts\/\" target=\"_blank\" rel=\"noopener\">\u99ac\u978d\u5f0f\u56de\u6d41\u710a\u66f2\u7dda(Ramp-Soak-Spike type)<\/a>\u8b93QFN\u7684\u6240\u6709\u710a\u588a\u6eab\u5ea6\u90fd\u9054\u5230\u76f8\u540c\u6eab\u5ea6\u5f8c\u518d\u9032\u5165\u56de\u710a\u5340\u3002 <\/font><\/p>\n<blockquote>\n<p><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u53c3\u8003\u95b1\u8b80\uff1a <\/font><a href=\"\/\/m.letratesoro.com\/2010\/07\/reflow-profile\/\"><font size=\"4\" face=\"\u5fae\u8edf\u6b63\u9ed1\u9ad4\">\u56de\u6d41\u710a\u7684\u6eab\u5ea6\u66f2\u7dda Reflow Profile<\/font><\/a><\/p>\n<\/blockquote>\n<p align=\"justify\"><font size=\"4\">\u66fe\u7d93\u767c\u73fe\u6709QFN\u5e95\u90e8\u4e2d\u9593\u7684\u63a5\u5730\u710a\u588a\u4e0a<strong><font color=\"#ff00ff\">\u5370\u5237\u904e\u591a\u932b\u818f<\/font><\/strong>\uff0c\u7576\u96f6\u4ef6\u6d41\u904e\u56de\u6d41\u710a\u6642\u9020\u6210\u96f6\u4ef6\u6d6e\u8d77\u5f62\u6210\u7a7a\u710a\u7684\u554f\u984c\uff0c\u9019\u6642\u5019\u53ef\u4ee5\u8003\u616e\u5c07 QFN \u5e95\u90e8\u4e2d\u9593\u7684\u63a5\u5730\u710a\u588a(EPad)\u5370\u5237\u6210\u300c<strong><font color=\"#ff00ff\">\u7530<\/font><\/strong>\u300d\u5b57\u578b\u6703\u6bd4\u6574\u7247\u5370\u5237\u8981\u4f86\u5f97\u597d\uff0c\u904e\u56de\u6d41\u710a\u6642\u4e5f\u8f03\u4e0d\u6703\u56e0\u70ba\u932b\u818f\u5168\u90e8\u7194\u878d\u7e2e\u6210\u4e00\u5718\u800c\u9020\u6210\u96f6\u4ef6\u6d6e\u8d77\u6d6e\u52d5\u7684\u60c5\u5f62\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"3\"><font size=\"4\">\u53e6\u5916\u96fb\u8def\u677f\u7684\u710a\u588a(soldering pad)\u4e0a<strong><font color=\"#ff00ff\">\u4e0d\u53ef\u4ee5\u6709\u5c0e\u901a\u5b54(vias)<\/font><\/strong>\uff0c\u5426\u5247\u6703\u9020\u6210\u932b\u91cf\u7121\u6cd5\u63a7\u5236\u5c0e\u81f4\u7a7a\u710a\u767c\u751f\u3002\u800c\u4e2d\u9593\u6563\u71b1\u63a5\u5730\u710a\u588a\u4e0a\u7684\u901a\u5b54(vias)\u4e5f\u8981\u76e1\u91cf\u4f7f\u7528\u7da0\u6f06\u585e\u5b54\uff0c\u6700\u597d\u53ef\u4ee5\u6216\u662f<strong><font color=\"#ff00ff\">\u96fb\u934d<strong><font color=\"#ff00ff\">\u585e\u5b54<\/font><\/strong><\/font><\/strong>\uff0c\u5982\u679c\u4fdd\u7559\u5927\u5b54\u5728\u63a5\u5730\u710a\u588a\u4e0a\u5c07\u56b4\u91cd\u5f71\u97ff\u710a\u932b\u91cf\uff0c\u4e26\u53ef\u80fd\u7522\u751f\u6c23\u6ce1\u3001\u63a5\u5730\u5403\u932b\u4e0d\u8db3\uff0c\u56b4\u91cd\u7684\u9084\u53ef\u80fd\u5c0e\u81f3\u529f\u80fd\u4e0d\u826f\u3002<\/font><\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u95dc\u65bcQFN\u4e2d\u9593EPad\u7684\u710a\u932b\u6c23\u6ce1\u5141\u6536\u7387\u53ef\u4ee5\u53c3\u8003\u9019\u4e00\u7bc7\u6587\u7ae0\uff1a<a href=\"\/\/m.letratesoro.com\/2022\/06\/qfn-void-ratio\/\" target=\"_blank\" rel=\"noopener\">BTC\u53caQFN\u5c01\u88dd\u4e2d\u8b6f\u540d\u7a31\u53caEPad\u6c23\u6ce1\u7a7a\u6d1e\u7387\u5141\u6536\u6a19\u6e96<\/a><\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u25bc \u4f7f\u7528\u7da0\u6f06(solder mask)\u585e\u5b54\u7684\u901a\u5b54(vias)\u3002<\/font>     <br \/><img loading=\"lazy\" decoding=\"async\" title=\"QFN_vias_plugged\" style=\"border-width: 0px; display: inline;\" border=\"0\" alt=\"QFN_vias_plugged\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/2010\/11\/QFN_vias_plugged.jpg\" width=\"200\" height=\"208\" \/><\/p>\n<p align=\"justify\"><font size=\"4\">\u95dc\u65bc\u901a\u5b54\u5728\u588a(vias-in-pad)\u662f\u500b\u300c\u516c\u8aaa\u516c\u6709\u7406\uff0c\u5a46\u8aaa\u5a46\u6709\u7406\u300d\u7684\u60c5\u6cc1\uff0cRD\u5e0c\u671b\u6563\u71b1\u826f\u597d\uff0c\u6240\u4ee5\u57cb\u5165\u8a31\u591a\u7684\u901a\u5b54\uff0c\u4f46\u662f\u901a\u5b54\u537b\u6703\u9020\u6210\u56b4\u91cd\u7684\u710a\u932b\u54c1\u8cea\u7f3a\u5931\uff0c\u4f7f\u7528\u96fb\u934d\u586b\u5b54\u53c8\u6703\u589e\u52a0PCB\u7684\u88fd\u9020\u6210\u672c\uff5e<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u5ef6\u4f38\u95b1\u8b80\uff1a<a href=\"\/\/m.letratesoro.com\/2010\/11\/vias-in-pad\/\" rel=\"noopener\" target=\"_blank\">\u5c0e\u901a\u5b54\u5728\u588a(Vias-in-pad)\u7684\u7f3a\u9ede\u53ca\u8655\u7406\u539f\u5247<\/a><\/font><\/p>\n<p align=\"justify\"><img decoding=\"async\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/Via-in-pad-design-rule.jpg\" \/><\/p>\n<p align=\"justify\"><font size=\"4\">\u52a0\u300c<strong><font color=\"#ff00ff\">\u6c2e\u6c23<\/font><\/strong>\u300d\u662f\u5426\u53ef\u4ee5\u6709\u6548\u589e\u52a0 QFN \u7684\u826f\u7387\uff1f\u500b\u4eba\u6301\u4fdd\u7559\u614b\u5ea6\uff0c\u6c2e\u6c23\u662f\u53ef\u4ee5\u9632\u6b62\u96f6\u4ef6\u6c27\u5316\uff0c\u4f46\u5982\u679cQFN\u7684\u5074\u9762\u7aef\u9ede\u5728\u710a\u63a5\u524d\u5df2\u7d93\u6c27\u5316\u7684\uff0c\u52a0\u4e86\u6c2e\u6c23\u662f\u5426\u9084\u80fd\u710a\u5f97\u4e0a\uff0c\u5c31\u6709\u5f85\u89c0\u5bdf\u4e86\uff0c\u5c31\u8ddf\u75c5\u5165\u818f\u8093\u7684\u75c5\u4eba\uff0c\u662f\u5426\u6709\u6551\u547d\u4e39\u53ef\u4ee5\u8d77\u6b7b\u56de\u751f\u985e\u4f3c\uff0c\u6cc1\u4e14\u52a0\u6c2e\u6c23\u9084\u6703\u589e\u52a0\u751f\u7522\u6210\u672c\uff0c\u9084\u662f\u64fa\u5728\u6700\u5f8c\u518d\u8003\u616e\u5c31\u597d\u4e86\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u76f8\u95dc\u95b1\u8b80\uff1a<a href=\"\/\/m.letratesoro.com\/2018\/08\/n2-reflow\/\" rel=\"noopener\" target=\"_blank\">SMT\u56de\u710a\u7210\u52a0\u6c2e\u6c23(N2)\u7684\u512a\u7f3a\u9ede\u63a2\u8a0e<\/a><\/font><\/p>\n<p><a name=\"wettable-flank-plated-QFN\"><\/a><\/p>\n<hr \/>\n<h4>\n<p align=\"justify\"><font color=\"#0000ff\" size=\"5\"><strong>\u5f8c\u8a18\uff1a<\/strong><\/font><\/p>\n<\/h4>\n<p align=\"justify\"><font size=\"4\">\u70ba\u4e86\u78ba\u4fdd\u6c7d\u8eca\u7b26\u5408\u5b89\u5168\u6027\u53ca\u9ad8\u53ef\u9760\u6027\u7684\u8981\u6c42\uff0c\u6c7d\u8eca\u884c\u696d\u8981\u6c42\u539f\u59cb\u8a2d\u5099\u88fd\u9020\u5546(OEM) \u5fc5\u9808\u57f7\u884c100%\u7684\u7d44\u88dd\u5f8c\u81ea\u52d5\u8996\u89ba\u6aa2\u67e5 (AVI, Automatic Visual Inspection)\u3002<\/font><\/p>\n<p align=\"justify\"><font size=\"4\">\u9084\u662f\u8981\u6709\u5927\u5496\u51fa\u4f86\u4e3b\u6301\u6b63\u7fa9\u5927\u5bb6\u624d\u6703\u91cd\u8996\u554f\u984c\u4e26\u63d0\u51fa\u89e3\u6c7a\u5c0d\u7b56\uff0c<font size=\"4\">\u9451\u65bcQFN\u710a\u932b\u96e3\u4ee5\u5224\u65b7\u554f\u984c\uff0c\u8fd1\u4f86\u6709\u4e9b\u96f6\u4ef6\u5546\u958b\u59cb\u63d0\u4f9b\u300c\u5074\u9762\u53ef\u710a\u5f0f\u968e\u68af\u710a\u9ede\u7684QFN\u5c01\u88dd\uff08wettable flank-plated QFN\uff09\u300d\uff0c\u88fd\u9020\u5546\u5728QFN\u5074\u908a\u710a\u9ede\u505a\u4e86\u90e8\u4efd\u96fb\u934d\uff0c\u4e5f\u5c31\u662f\u53ef\u4ee5\u4fdd\u8b49QFN\u5074\u908a\u710a\u9ede\u81f3\u5c11\u90e8\u4efd\u5403\u932b\uff0c\u4e5f\u53ef\u4ee5\u65b9\u4fbf\u4f5c\u696d\u54e1\u5f9e\u5074\u908a\u5c31\u53ef\u4ee5\u5224\u65b7QFN\u710a\u63a5\u662f\u5426\u826f\u597d\uff0c\u4e0d\u77e5\u9053\u662f\u5426\u6709\u4eba\u4f7f\u7528\u904e\uff1f\u6548\u679c\u5982\u4f55\uff1f<\/font> <\/font><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"\/\/m.letratesoro.com\/wp-content\/uploads\/QFN-Wettable flanks.jpg\" \/>     <br \/><font size=\"4\">(\u5716\u7247\u4f86\u81eaNXP) <\/font><\/p>\n<hr \/>\n<p><font size=\"4\">\u4ee5\u4e0a\u662f\u500b\u4eba\u5c0d QFN \u7684\u77ad\u89e3\u8207\u770b\u6cd5\uff0c\u5982\u6709\u4e0d\u540c\u610f\u898b\u3001\u770b\u6cd5\uff0c\u6b61\u8fce\u7559\u8a00\u8a0e\u8ad6\u2026<\/font><\/p>\n<hr \/>\n<p><font size=\"4\">\u76f8\u95dc\u95b1\u8b80\uff1a<\/font><\/p>\n<ul>\n<li><a href=\"\/\/m.letratesoro.com\/2010\/07\/step-up-stencil\/\"><font size=\"4\">Step-up &amp; step-down stencil \u92fc\u677f\u5c40\u90e8\u52a0\u539a\/\u6253\u8584<\/font><\/a><\/li>\n<li><a href=\"\/\/m.letratesoro.com\/2010\/11\/dip-paste-in-hole\/\"><font size=\"4\">\u8b93\u901a\u5b54\u5143\u4ef6\/\u50b3\u7d71\u63d2\u4ef6\u4e5f\u8d70\u8ff4\u710a\u7210\u88fd\u7a0b(paste-in-hole)<\/font><\/a><\/li>\n<li><a href=\"\/\/m.letratesoro.com\/2016\/06\/3d-x-ray-ct\/\"><font size=\"4\">\u30103D X-Ray CT\u3011\u975e\u7834\u58de\u6027\u7acb\u9ad4\u65b7\u5c64\u6383\u63cf\u5206\u6790PCBA\u4e0d\u826f<\/font><\/a><\/li>\n<li><a href=\"\/\/m.letratesoro.com\/2022\/06\/qfn-epad-void-solution\/\"><font size=\"4\">QFN\u53caBTC\u6563\u71b1\u588a\u710a\u63a5\u7a7a\u6d1e\u76843\u500b\u5f62\u6210\u539f\u56e0\u53ca5\u500b\u53ef\u80fd\u89e3\u6c7a\u65b9\u6848<\/font><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>QFN (Quad Flat No leads\uff0c &#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,3,4],"tags":[72],"aioseo_notices":[],"views":87566,"_links":{"self":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/695"}],"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=695"}],"version-history":[{"count":5,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/695\/revisions"}],"predecessor-version":[{"id":11173,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/695\/revisions\/11173"}],"wp:attachment":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/media?parent=695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/categories?post=695"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/tags?post=695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}