{"id":6876,"date":"2018-04-25T08:12:00","date_gmt":"2018-04-25T00:12:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=6876"},"modified":"2023-02-14T09:58:19","modified_gmt":"2023-02-14T01:58:19","slug":"solder-crack-study-09","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2018\/04\/solder-crack-study-09\/","title":{"rendered":"\u96fb\u5b50\u96f6\u4ef6\u6389\u843d\u6216BGA\u932b\u88c2\u4e00\u5b9a\u662fSMT\u88fd\u7a0b\u554f\u984c\u8ff7\u601d(9)\uff1f\u589e\u52a0\u96f6\u4ef6\u5c0d\u61c9\u529b\u7684\u62b5\u6297\u80fd\u529b"},"content":{"rendered":"

\"\u96fb\u5b50\u96f6\u4ef6\u6389\u843d\u6216\u932b\u88c2\u4e00\u5b9a\u662fSMT\u88fd\u7a0b\u554f\u984c\u8ff7\u601d(9)\uff1f\u589e\u52a0\u96f6\u4ef6\u5c0d\u61c9\u529b\u7684\u62b5\u6297\u80fd\u529b\"<\/p>\n

\uff08\u5c0d\u65bc\u5927\u9678\u90a3\u4e9b\u76dc\u6587\u7db2\u7ad9\uff0c\u8907\u88fd\u8cbc\u4e0a\u672c\u7ad9\u6587\u7ae0\u5f8c\uff0c\u5c45\u7136\u9084\u6539\u6210\u81ea\u5df1\u516c\u53f8\u7684\u540d\u5b57\uff0c\u611f\u5230\u7121\u6065\uff01\u6587\u7ae0\u5167\u5bb9\u90e8\u4efd\u9632\u6b62\u8907\u88fd\u4f5c\u6cd5\u53ef\u80fd\u9020\u6210\u60a8\u95b1\u8b80\u7684\u4e0d\u4fbf\uff0c\u8acb\u898b\u8ad2\uff01\uff09<\/font><\/p>\n

\u589e\u52a0\u96f6\u4ef6\u5c0d\u61c9\u529b\u7684\u62b5\u6297\u80fd\u529b<\/strong><\/font><\/p>\n


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2.\u91dd\u5c0dBGA\u5c01\u88dd\u7684\u56db\u500b\u89d2\u843d\u4e0d\u8981\u8a2d\u8a08\u932b\u7403\u6216\u4f7f\u7528Dummy-ball<\/strong><\/font><\/p>\n

\u5982\u679c\u4f60\u6709\u5728\u986f\u5fae\u93e1\u4e0b\u4ed4\u7d30\u7814\u7a76\u904eBGA\u7834\u88c2\u7684\u5be6\u969b\u73fe\u8c61\uff0c\u61c9\u8a72\u6703\u767c\u73fe\u7d55\u5927\u90e8\u5206\u7684BGA\u90fd\u662f\u5f9e\u5916\u908a\u56db\u500b\u89d2\u843d\u8655\u7684\u932b\u7403\u958b\u59cb\u7834\u88c2\u7684\uff0c\u9019\u662f\u56e0\u70baBGA\u56db\u500b\u89d2\u843d\u5c0d\u65bc\u677f\u5f4e\u7684\u529b\u8ddd\u662f\u6700\u9060\u7684\uff0c\u6240\u4ee5\u5b83\u5011\u4e5f\u662f\u677f\u5f4e\u677f\u7ff9\u5f8c\u627f\u53d7\u6700\u5927\u61c9\u529b\u4e4b\u8655\uff0c\u7576\u7136\u4e5f\u5c31\u6700\u5bb9\u6613\u767c\u751f\u710a\u932b\u7834\u88c2\u3002<\/font><\/p>\n

<\/p>\n

\"\u91dd\u5c0dBGA\u5c01\u88dd\u7684\u56db\u500b\u89d2\u843d\u4e0d\u8981\u8a2d\u8a08\u932b\u7403\u6216\u4f7f\u7528Dummy-ball\"<\/font>\"NAND_Flash_BGA_indicator\"<\/p>\n

\u6240\u4ee5\uff0c\u5728BGA\u5c01\u88dd\u8a2d\u8a08\u6642\u5982\u679c\u53ef\u4ee5\u5728\u5176\u56db\u500b\u89d2\u843d\u7684\u5730\u65b9\u8a2d\u8a08\u6c92\u6709\u529f\u80fd\u8a0a\u865f\u7684\u5047\u7403(Dummy-ball)\u6216\u662f\u76f4\u63a5\u4e0d\u8981\u690d\u7403<\/a>\uff0c\u90fd\u53ef\u4ee5\u6709\u6548\u7684\u8d77\u5230\u4fdd\u8b77BGA\u56db\u500b\u89d2\u843d\u710a\u9ede\u4e4b\u76ee\u7684\uff0c\u4e26\u964d\u4f4e\u932b\u7403\u7834\u88c2\u7684\u98a8\u96aa\u3002\u73fe\u5728\u5df2\u7d93\u6709\u8a31\u591a\u7684SRAM\u53caDDR\u7684BGA\u5c01\u88dd\u63a1\u7528\u9019\u6a23\u7684\u8a2d\u8a08\u4e86\uff0c\u4e0d\u904e\u5de5\u4f5c\u718a\u8a8d\u70baCPU\u53caMCU\u624d\u662f\u6700\u61c9\u8a72\u5c0e\u5165\u9019\u7a2e\u8a2d\u8a08\u7684BGA\uff0c\u56e0\u70ba\u5b83\u5011\u7684\u5c3a\u5bf8\u6700\u5927\u3002<\/font><\/p>\n

3.\u8f03\u8584PCB\u63a1\u7528\u56de\u710a\u904e\u7210\u8f09\u5177\u6216\u5168\u7a0b\u8f09\u5177\u964d\u4f4e\u677f\u5f4e\u8b8a\u5f62\u98a8\u96aa<\/strong><\/font><\/p>\n

<\/font><\/p>\n

\u5de5\u4f5c\u718a\u500b\u4eba\u8a8d\u70ba\uff0cPCB\u539a\u5ea6\u5982\u679c\u57281.2mm\u4ee5\u4e0b\u61c9\u8a72\u63a1\u7528\u300c\u56de\u710a\u904e\u7210\u8f09\u5177(reflow carrier)\u300d\uff0c\u5982\u679c\u662f\u57281.0mm\u4ee5\u4e0b\u53ef\u80fd\u9084\u5fc5\u9808\u63a1\u7528\u300c\u5168\u7a0b\u8f09\u5177(full process carrier)\u300d\uff0c\u5373\u4f7f\u662f1.6mm\u542b\u6216\u4ee5\u4e0a\u7684\u677f\u5b50\uff0c\u53ef\u80fd\u90fd\u8981\u8996\u60c5\u6cc1\u63a1\u7528SMT\u8f09\u5177\u3002<\/font><\/p>\n

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\u5efa\u8b70\u5ef6\u4f38\u95b1\u8b80\uff1a
<\/font>
\u70ba\u4ec0\u9ebcSMT\u9700\u8981\u56de\u710a\u904e\u7210\u6258\u76e4(reflow carrier)\u8207\u5168\u7a0b\u8f09\u5177(Full process carrier)\uff1f<\/font><\/a><\/p>\n

\"\u8f03\u8584PCB\u63a1\u7528\u56de\u710a\u904e\u7210\u8f09\u5177\u6216\u5168\u7a0b\u8f09\u5177\u964d\u4f4e\u677f\u5f4e\u8b8a\u5f62\u98a8\u96aa\"<\/font><\/p>\n

PCB\u4e4b\u6240\u4ee5\u6703\u5728\u904e\u56de\u710a\u6642\u5f4e\u66f2\u8b8a\u5f62\uff0c\u662f\u56e0\u70ba\u6211\u5011\u73fe\u5728\u7121\u925b\u88fd\u7a0b\u6240\u63a1\u7528\u7684PCB\u90fd\u50c5\u70baTg150\u7684\u677f\u6750\uff0c\u610f\u601d\u5c31\u662f\u6eab\u5ea6\u904e\u4e86150\u00b0C\u5f8c\u677f\u6750\u5c31\u6703\u958b\u59cb\u8edf\u5316\uff0c\u800c\u7121\u925b\u88fd\u7a0b\u7684\u56de\u710a\u6eab\u5ea6\u5247\u9ad8\u9054250\u00b0C\u4e0a\u4e0b\uff0c\u4e5f\u5c31\u662f\u8aaa\u73fe\u4eca\u7684PCB\u53ea\u8981\u7d93\u904e\u56de\u710a\u7210\u5f8c\u591a\u591a\u5c11\u5c11\u4e00\u5b9a\u90fd\u6703\u7522\u751f\u5f62\u8b8a\uff0c\u800c\u4e14PCB\u677f\u539a\u8d8a\u8584\u7684\uff0c\u5728\u56de\u710a\u7210\u4e2d\u8edf\u5316\u5f62\u8b8a\u7684\u5c31\u8d8a\u56b4\u91cd\uff0c\u7576\u7136\u9084\u6709\u5176\u4ed6\u56e0\u7d20\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u677f\u5f4e\uff0c\u6bd4\u5982\u8aaa\u677f\u5b50\u4e0a\u7684\u9285\u7b94\u5206\u4f48\u5747\u52fb\u5ea6\uff0c\u6709\u7121\u904e\u91cd\u96f6\u4ef6\uff0c\u677f\u5b50\u5c3a\u5bf8\u5927\u5c0f\u3001\u5408\u677f\u7684\u9023\u7b4b\u5927\u5c0f\u8207\u4f4d\u7f6e…\u7b49\uff0c\u6eab\u5ea6\u5247\u662f\u6700\u5927\u7684\u8ca2\u737b\u56e0\u5b50\uff0c\u4f7f\u7528\u8f09\u5177\u53ef\u4ee5\u5f37\u8febPCB\u904e\u7210\u6642\u7dad\u6301\u5176\u5e73\u6574\u5ea6\uff0c\u964d\u4f4e\u677f\u5f4e\u8b8a\u5f62\u91cf\u3002<\/font><\/p>\n

\u4e0d\u904e\uff0c\u5de5\u4f5c\u718a\u5fc5\u9808\u5f37\u8abf\uff1a\u300c\u4f7f\u7528\u8f09\u5177\u96d6\u7136\u53ef\u4ee5\u6709\u6548\u6291\u5236PCB\u8b8a\u5f62\uff0c\u4f46\u537b\u4e0d\u80fd\u7d55\u5c0d\u89e3\u6c7aBGA\u932b\u88c2\u7684\u554f\u984c\u300d\uff0c\u5982\u679c\u4f60\u7684\u677f\u539a\u5df2\u7d93\u5230\u4e860.8mm\u4ee5\u4e0b\uff0c\u8001\u5be6\u8aaa\u5373\u4f7f\u4e0d\u5728\u9ad8\u6eab\u4e0b\u96a8\u4fbf\u90fd\u53ef\u80fd\u5f4e\u66f2\uff0c\u4e00\u500b\u64cd\u4f5c\u4e0d\u614e\u5c31\u932b\u88c2\uff0c\u90a3\u771f\u7684\u6c92\u641e\u982d\uff0c\u53e6\u5916\uff0c\u6703\u677f\u5f4e\u677f\u7ff9\u7684\u4e0d\u50c5\u50c5PCB\uff0c\u5c31\u9023BGA\u4e0a\u7684\u8f09\u677f\u4e5f\u6703\uff0c\u8f09\u677f\u96d6\u7136\u4f7f\u7528\u9ad8Tg\u7684\u6750\u6599\uff0c\u4f46\u9802\u591a\u4e5f\u5c31\u662fTg175\uff0c\u8a2d\u8a08\u4e0d\u826f\u7684BGA\u904e\u7210\u6642\u53ef\u80fd\u5f4e\u66f2\u5f97\u8ddf\u9999\u8549\u90fd\u6709\u5f97\u6bd4\uff0c\u53ea\u80fd\u8aaa\u6709\u5929\u624d\u7814\u767c(R&D)\u5728\uff0c\u88fd\u7a0b\u5c31\u53ea\u80fd\u591a\u64d4\u5f85\u3002<\/font><\/p>\n

\u5efa\u8b70\u5ef6\u4f38\u95b1\u8b80\uff1a
\u4f55\u8b02\u73bb\u7483\u8f49\u79fb\u6eab\u5ea6(Tg, Glass Transition Temperature)<\/a><\/font><\/p>\n


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\u300c\u96fb\u5b50\u96f6\u4ef6\u6389\u843d\u6216\u932b\u88c2\u4e00\u5b9a\u662fSMT\u88fd\u7a0b\u554f\u984c\u8ff7\u601d\u300d\u7cfb\u5217\u6587\u7ae0\u5217\u8868\uff1a<\/font><\/strong><\/p>\n