{"id":3815,"date":"2015-12-30T08:18:00","date_gmt":"2015-12-30T00:18:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=3815"},"modified":"2018-08-11T15:53:57","modified_gmt":"2018-08-11T07:53:57","slug":"bga-crack-solution","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2015\/12\/bga-crack-solution\/","title":{"rendered":"[\u6848\u4f8b]BGA\u932b\u7403\u958b\u88c2\u4e0d\u826f\uff0c\u5229\u7528\u61c9\u8b8a\u8a08\u78ba\u8a8d\u6a5f\u69cb\u8a2d\u8b8a\u5c0d\u7b56\u524d\u5f8c\u6539\u5584\u72c0\u6cc1"},"content":{"rendered":"
<\/p>\n
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\u5176\u5be6BGA\u932b\u7403\u958b\u88c2\u7684\u6700\u5927\u554f\u984c\u5341\u6709\u516b\u4e5d\u90fd\u4f86\u81ea\u65bc\u61c9\u529b(Stress)<\/font><\/strong><\/font>\uff0c\u4e0d\u7ba1\u662fSMT\u56de\u710a\u9ad8\u6eab\u6642\u677f\u5b50\u5f4e\u66f2\u8b8a\u5f62\u6240\u5f62\u6210\u7684\u61c9\u529b\uff0c\u9084\u662f\u7522\u54c1\u56e0\u70ba\u6a5f\u69cb\u7d44\u88dd\u6240\u5f62\u6210\u7684\u61c9\u529b\uff0c\u6216\u662f\u56e0\u70ba\u5ba2\u6236\u4f7f\u7528\u6642\u649e\u64ca\uff0c\u6216\u4e0d\u614e\u6389\u843d\u5730\u9762\u6240\u9020\u6210\u7684\u5916\u529b\uff0c\u9019\u4e9b\u5176\u5be6\u90fd\u662f\u61c9\u529b\u7684\u4f86\u6e90\uff0c\u5982\u679c\u8a2d\u8a08\u4e4b\u521d\u5c31\u53ef\u4ee5\u6a21\u64ec\u5404\u7a2e\u72c0\u6cc1\u505a\u61c9\u529b\u61c9\u8b8a\u5206\u6790\uff0c\u4e26\u91dd\u5c0d\u53ef\u80fd\u7522\u751f\u61c9\u529b\u7684\u90e8\u4efd\u505a\u4e00\u4e9b\u8a2d\u8a08\u8abf\u6574\u4ee5\u964d\u4f4e\u61c9\u529b\u7684\u5f71\u97ff\uff0c\u76f8\u4fe1\u53ef\u4ee5\u8b93BGA\u7522\u54c1\u7684\u751f\u7522\u54c1\u8cea\u66f4\u52a0\u7a69\u5b9a\uff0c\u751a\u81f3\u9084\u53ef\u4ee5\u79fb\u9664\u4e00\u4e9b\u4e0d\u5fc5\u8981\u7684underfill\u88fd\u7a0b\uff0c\u9054\u5230\u7bc0\u7701\u6210\u672c\u7684\u5229\u76ca\u3002<\/font><\/p>\n \u4e0d\u77e5\u662f\u5426\u56e0\u70ba\u5de5\u4f5c\u718a\u5c0d\u65b0\u7522\u54c1\u6709\u904e\u591a\u6b21\u7684\u985e\u4f3c\u8981\u6c42\uff0c\u9084\u662f\u5927\u5bb6\u7d42\u65bc\u9ad4\u8a8d\u5230\u8a2d\u8a08\u5f71\u97ff\u88fd\u9020\u7684\u56b4\u91cd\u6027\uff0c\u516c\u53f8\u9019\u6b21\u65b0\u7522\u54c1\u7684\u8a2d\u8a08\u5718\u968a\u7e3d\u7b97\u6709\u500b\u6bd4\u8f03\u597d\u7684\u56de\u61c9\uff0c\u4e5f\u82b1\u4e86\u5fc3\u601d\u505a\u4e86BGA\u932b\u7403\u958b\u88c2\u7684\u7279\u6027\u8981\u56e0\u5206\u6790<\/a>\uff0c\u767c\u73fe\u61c9\u529b\u7684\u4f86\u6e90\uff0c\u4e26\u4e14\u505a\u4e86\u8a2d\u8a08\u8b8a\u66f4\u4f86\u6539\u5584\u9019\u500bBGA\u932b\u7403\u958b\u88c2\u7684\u554f\u984c\uff0c\u7576\u7136\u6709\u5148\u7528mockup\u7684\u6750\u6599\u4f86\u505a\u9a57\u8b49\uff0c\u7d50\u679c\u4e5f\u8457\u5be6\u8b93\u4eba\u6eff\u610f\uff0c\u4e8b\u5f8c\u5be6\u969b\u4fee\u6a21\u751f\u7522\u5f8c\u518d\u505a\u6700\u7d42QA\u9a57\u8b49\u4e5f\u90fd\u6c92\u6709\u518d\u767c\u73feBGA\u958b\u88c2\u7684\u554f\u984c\uff0c\u771f\u5fc3\u5e0c\u671b\u9019\u500b\u300c\u61c9\u529b\u61c9\u8b8a\u9a57\u8b49\u52d5\u4f5c<\/font><\/strong>\u300d\u4ee5\u5f8c\u6703\u662fRD\u9a57\u8b49\u7684\u6a19\u6e96\u7a0b\u5e8f\u3002<\/font><\/p>\n \u5229\u7528\u61c9\u8b8a\u8a08(Strain Gauge)\u9a57\u8b49\u6a5f\u69cb\u8a2d\u8a08\u8b8a\u66f4\u524d\u5f8c\u5c0dBGA\u932b\u7403\u958b\u88c2\u4f4d\u7f6e\u7684\u61c9\u8b8a\u91cf\u5206\u6790<\/strong><\/font><\/p>\n \u4ee5\u4e0b\u5c31\u662f\u9019\u6b3e\u7522\u54c1\u7684\u5927\u6982\u8a2d\u8a08\u5916\u578b\u8207BGA\u6240\u5728\u4f4d\u7f6e\uff0c\u70ba\u4e86\u65b9\u4fbf\u5ba2\u6236\u4f7f\u7528\u6642\u4e0d\u81f3\u65bc\u767c\u751f\u87a2\u5e55\u53cd\u5149\uff0c\u6240\u4ee5\u7522\u54c1\u8a2d\u8a08\u4e86\u4e00\u500b\u985e\u4f3c\u6536\u9280\u6a5f\u7684\u50be\u659c\u87a2\u5e55\uff0c\u4e5f\u5c31\u662f\u9019\u500b\u50be\u659c\u89d2\u8b93BGA\u96f6\u4ef6\u5728\u7522\u54c1\u505a\u6b63\u80cc\u9762\u843d\u4e0b\u6e2c\u8a66\u6642\u627f\u53d7\u4e86\u5de8\u5927\u7684\u96fb\u8def\u677f\u8b8a\u5f62\u91cf\uff0c\u4ee5\u81f4\u9020\u6210BGA\u932b\u7403\u88c2\u958b\uff0c\u56e0\u70ba\u7522\u54c1\u7684\u5074\u908a(side)\u53ca\u89d2\u843d(corner)\u6454\u843d\u90fd\u6c92\u6709\u767c\u73fe\u554f\u984c\uff0c\u4ee5\u524d\u7684\u4f8b\u5b50\u5e7e\u4e4e\u90fd\u662f\u5728\u89d2\u843d\u6454\u51fa\u554f\u984c\u7684\u3002<\/font><\/p>\n <\/p>\n \u65e2\u7136\u77e5\u9053\u53ef\u80fd\u7684\u554f\u984c\u51fa\u5728\u96fb\u8def\u677f\u8b8a\u5f62\u91cf\u904e\u5927<\/font>\uff0c\u65bc\u662f\u5728\u96fb\u8def\u677f\u4e0a\u9ecf\u8cbc\u3010\u61c9\u8b8a\u8a08(Strain Gauge)<\/a>\u3011\uff0c\u6240\u5148\u91cf\u6e2c\u672a\u6539\u5584\u524d\u7684\u61c9\u8b8a\u91cf\u6578\u64da\uff0c\u7136\u5f8c\u5728\u96fb\u8def\u677f\u7b49\u4e3b\u8981\u7d44\u4ef6\u4e0d\u8b8a\u5f97\u60c5\u6cc1\u4e0b\uff0c\u66f4\u63db\u6539\u5584\u5f8c\u7684\u6a5f\u69cb\u518d\u505a\u4e00\u6b21\u61c9\u8b8a\u91cf\u7684\u91cf\u6e2c\u3002<\/font><\/p>\n \u6539\u5584\u65b9\u6cd5\u662f\u5728BGA\u96f6\u4ef6\u7684\u9644\u8fd1\u65b0\u589e\u5851\u81a0\u6a5f\u6e9d\u808b\u67f1(rib)\u4f86\u9802\u4f4f\u96fb\u8def\u677f\u4ee5\u964d\u4f4e\u96fb\u8def\u677f\u5728\u843d\u4e0b\u6642\u7684\u8b8a\u5f62\u91cf\uff0c\u53c3\u8003\u4e0a\u5716\u7684[New add rib]\u3002<\/font><\/p>\n <\/p>\n \u56e0\u70ba\u5728\u505a\u9019\u500b\u52d5\u4f5c\u6642\u7522\u54c1\u7684\u5927\u90e8\u5206\u8a2d\u8a08\u90fd\u5df2\u7d93\u5b8c\u6210\u4e86\uff0c\u6240\u4ee5\u6539\u5584\u7684\u65b9\u6cd5\u5c31\u662f\u76e1\u91cf\u627e\u5230\u4e00\u500b\u7a7a\u9593\u53ef\u4ee5\u7528\u4f86\u589e\u52a0\u652f\u6490\u67f1\uff0c\u8b93\u96fb\u8def\u677f\u5728\u843d\u4e0b\u8b8a\u5f62\u6642\u6709\u786c\u7269\u53ef\u4ee5\u652f\u6490\u4f4f\uff0c\u4ee5\u964d\u4f4e\u5176\u8b8a\u5f62\u91cf\u3002<\/font><\/p>\n <\/p>\n \u61c9\u8b8a\u8a08\u91cf\u6e2c\u6a5f\u69cb\u6539\u5584\u524d\u5f8c\u7684\u61c9\u8b8a\u91cf<\/font><\/strong><\/p>\n \u4e0b\u8868\u5217\u51fa\u6539\u5584\u524d\u8207\u6539\u5584\u5f8c(\u589e\u52a0rib)\u7684\u5fae\u61c9\u8b8a\u91cf(Micro-Strain\uff0cx106<\/sup>)\u5be6\u969b\u91cf\u6e2c\u503c\u3002\u5c31\u5982\u540c\u9810\u671f\u7684\uff0c\u5728\u6b63\u9762\uff08\u50be\u659c\u9762\uff09\u843d\u4e0b\u6642\u7684\u61c9\u8b8a\u91cf\u6539\u5584\u9054\u5230106\uff0c\u56e0\u70ba\u7522\u54c1\u6b63\u9762(Top)\u5916\u578b\u6709\u500b\u5f4e\u66f2\u50be\u659c\u89d2\uff0c\u6bd4\u8f03\u5bb9\u6613\u56e0\u70ba\u5916\u529b\u800c\u9020\u6210\u5f4e\u66f2\uff1b\u800c\u80cc\u9762\uff08Bottom\uff09\u70ba\u5e73\u9762\u843d\u4e0b\u7684\u61c9\u8b8a\u91cf\u6539\u5584\u5247\u6bd4\u8f03\u5c0f\uff0c\u53ea\u670942\u3002<\/font><\/p>\n \u7531\u6b64\u53ef\u898b\u589e\u52a0\u4e00\u6839\u808b\u689d(rib)\u5c31\u53ef\u4ee5\u9054\u5230\u4e00\u5b9a\u7a0b\u5ea6\u7684\u96fb\u8def\u677f\u8b8a\u5f62\u91cf\u6539\u5584\u3002\u9019\u500b\u61c9\u8b8a\u503c\u91cf\u6e2c\u7684\u662f\u96fb\u8def\u677f\u7684Z\u65b9\u5411\uff0c\u4f46\u662f\u53ea\u6709X\u8ef8\u7684Z\u503c\uff0c\u5982\u679c\u53ef\u4ee5\u52a0\u6e2cY\u8ef8\u7684Z\u503c\u6703\u66f4\u6709\u53c3\u8003\u50f9\u503c\u3002<\/font><\/p>\n