{"id":6226,"date":"2017-04-05T08:43:00","date_gmt":"2017-04-05T00:43:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=6226"},"modified":"2024-02-02T22:00:00","modified_gmt":"2024-02-02T14:00:00","slug":"wetting-principle","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2017\/04\/wetting-principle\/","title":{"rendered":"PCB\u53ca\u96fb\u5b50\u96f6\u4ef6\u710a\u932b\u5403\u5f97\u597d\u4e0d\u597d(\u6f64\u6fd5\u3001\u4e0d\u6f64\u6fd5\u3001\u7e2e\u932b\u3001\u9000\u6f64\u6fd5)\u7684\u539f\u7406\u662f\u4ec0\u9ebc\uff1f"},"content":{"rendered":"

\"PCB\u53ca\u96fb\u5b50\u96f6\u4ef6\u710a\u932b\u5403\u5f97\u597d\u4e0d\u597d(\u6f64\u6fd5\u3001\u4e0d\u6f64\u6fd5\u3001\u7e2e\u932b\u3001\u9000\u6f64\u6fd5)\u7684\u539f\u7406\u662f\u4ec0\u9ebc\uff1f\"<\/p>\n

\u5f88\u591a\u670b\u53cb\u53ef\u80fd\u90fd\u6c92\u6709\u7d30\u60f3\u904e\u710a\u932b\u5403\u5f97\u597d\u8207\u4e0d\u597d\u7684\u539f\u7406\u662f\u4ec0\u9ebc\uff1f\u6709\u54ea\u4e9b\u56e0\u7d20\u6703\u9020\u6210\u96f6\u4ef6\u7a7a\u710a\uff1f<\/strong><\/font><\/p>\n

\u4e00\u822cIPC\u5de5\u696d\u6a19\u6e96\u7684\u82f1\u6587\u7248\u672c\u4ee5Wetting(\u6f64\u6fd5)<\/font><\/strong>\u4f86\u5f62\u5bb9\u5403\u932b\u78ba\u5be6\u975e\u5e38\u50b3\u795e\uff0c\u628a\u710a\u932b\u60f3\u50cf\u6210\u300c\u6c34\u300d\u7684\u6a23\u5b50\uff0c\u6709\u300c\u6f64\u6fd5 \u300d\u5c31\u8868\u793a\u5403\u932b\u5403\u5f97\u597d\uff0c\u6c92\u6709\u88ab\u300c\u6f64\u6fd5 \u300d\u5c31\u662f\u300c\u4e0d\u6f64\u6fd5 \u300d\u5247\u8868\u793a\u5403\u932b\u5403\u5f97\u4e0d\u597d\uff0c\u6216\u751a\u81f3\u6c92\u5403\u932b\u3002<\/font><\/p>\n

\u90a3\u662f\u4ec0\u9ebc\u56e0\u7d20\u5f71\u97ff\u4e86\u300c\u6f64\u6fd5\u300d\u7684\u7a0b\u5ea6\u5462\uff1f\u6f64\u6fd5\u7684\u7d42\u6975\u8868\u73fe\u53ef\u4ee5\u7528\u6709\u6c92\u6709\u5f62\u6210IMC(Intermetallic Compound)<\/a>\u4f86\u505a\u6700\u7d42\u78ba\u8a8d\uff0c\u800cIMC\u5176\u5be6\u662f\u4e00\u7a2e\u5316\u5b78\u53cd\u61c9\u7684\u7d50\u679c\uff0c\u5982\u679c\u662f\u9285\u57fa\u5730\u7684PCB\uff08OSP\u662f\u4e5f\uff09\u5247\u677f\u5b50\u4e0a\u7684\u9285\u6703\u8207\u932b\u818f\u4e2d\u7684\u932b\u751f\u6210Cu6<\/sub>Sn5<\/sub>\uff0c\u5982\u679c\u662f\u93b3\u57fa\u5730\u7684PCB\uff08ENIG\u662f\u4e5f\uff09\u5247\u677f\u4e0a\u91d1\u5c64\u4e0b\u9762\u7684\u93b3\u6703\u8207\u932b\u818f\u4e2d\u7684\u932b\u751f\u6210Ni3<\/sub>Sn4<\/sub>\uff0cIMC\u7684\u751f\u6210\u7269\u662f\u4e00\u7a2e\u5316\u5408\u7269\uff0c<\/font>\u800c\u60f3\u8981\u8b93\u710a\u932b\u5f62\u6210\u5316\u5b78\u53cd\u61c9\u5c31\u9700\u8981\u300c\u71b1\u80fd\u300d\uff0c\u71b1\u80fd\u53c8\u53d6\u6c7a\u65bc\u6eab\u5ea6\uff0c\u9019\u88e1\u53ef\u80fd\u8981\u518d\u52a0\u4e0a\u6642\u9593\uff0c\u4f46\u80fd\u4e0d\u80fd\u76f4\u63a5\u4ee5Reflow\u6eab\u5ea6\u66f2\u7dda\u4e0b\u7684\u9762\u7a4d\uff08\u6eab\u5ea6 x \u6642\u9593\uff09\u4f86\u8a08\u7b97\u5c31\u6709\u5f85\u5546\u69b7\u3002<\/font><\/p>\n

<\/p>\n

\"Soaking\"Slumping<\/p>\n

\u7e3d\u4e4b\uff0c\u5230\u76ee\u524d\u70ba\u6b62\u3010\u6eab\u5ea6\u3011\u5c31\u662f\u6c7a\u5b9a\u932b\u818f\u6f64\u6fd5(\u5403\u932b)\u662f\u5426\u826f\u597d\u7684\u4e3b\u8981\u56e0\u7d20\uff0c\u4e5f\u5c31\u662f\u8aaa\u7576\u7d66\u4e88\u7684\u6eab\u5ea6\u9ad8\u65bc\u932b\u818f\u7194\u932b\u7684\u6eab\u5ea6\u4f7f\u5176\u53ef\u4ee5\u5f62\u6210IMC\u5c31\u53ef\u4ee5\u5f62\u6210\u826f\u597d\u7684\u5403\u932b\uff0c\u63db\u500b\u6bd4\u8f03\u5b78\u8853\u7684\u8aaa\u6cd5\uff0c\u7576\u7d66\u4e88\u7684\u71b1\u80fd\u9ad8\u904ePCB\u7684\u8868\u9762\u8655\u7406\u53ca\u932b\u818f\u7684\u300c\u8868\u9762\u80fd\u300d\uff0c\u5c31\u80fd\u5f62\u6210\u5316\u5b78\u53cd\u61c9\uff0c\u6240\u8b02\u7684\u300c\u8868\u9762\u80fd\u300d\u662f\u5275\u9020\u7269\u8cea\u8868\u9762\u6642\uff0c\u7834\u58de\u5206\u5b50\u9593\u5316\u5b78\u9375\u6240\u9700\u6d88\u8017\u7684\u80fd\u91cf\u3002<\/font><\/p>\n

\u4ee5\u4e0a\u662f\u7406\u60f3\u7684\u72c0\u614b\uff0c\u90a3\u5982\u679cPCB\u7684\u8868\u9762\u8655\u7406\u6216\u662f\u932b\u818f\u6c27\u5316\u4e86\uff0c\u5b83\u5011\u7684\u8868\u9762\u80fd\u5c31\u6703\u96a8\u8457\u6c27\u5316\u7a0b\u5ea6\u800c\u589e\u52a0\uff0c\u4f46SMT\u7684\u56de\u710a(Reflow)\u6eab\u5ea6\u537b\u662f\u56fa\u5b9a\u7684\uff0c\u56e0\u70ba\u6709\u4e9b\u96f6\u4ef6\u8a2d\u8a08\u4e0d\u53ef\u4ee5\u8010\u5230\u66f4\u9ad8\u6eab\uff0c\u65bc\u662f\u7d66\u4e88\u7684\u71b1\u80fd\u4e0d\u8b8a\uff0c\u4f46\u8868\u9762\u80fd\u589e\u52a0\u7684\u60c5\u6cc1\u4e0b\u5c31\u6703\u9020\u6210\u6f64\u6fd5\u4e0d\u826f\u7684\u60c5\u5f62\uff0c\u7576\u6c27\u5316\u7a0b\u5ea6\u4e0d\u662f\u5f88\u56b4\u91cd\u6642\uff0c\u5c31\u6703\u767c\u751f\u90e8\u4efd\u53ef\u4ee5\u6f64\u6fd5\uff0c\u90e8\u4efd\u4e0d\u6f64\u6fd5\u7684\u7e2e\u932b(De-Wetting)\u73fe\u8c61\uff0c\u5927\u9678\u7a31\u300c\u7e2e\u932b\u300d\u70ba\u300c\u9000\u6f64\u6fd5\u300d\uff0c\u7576\u6c27\u5316\u975e\u5e38\u7684\u56b4\u91cd\u5c31\u6703\u9020\u6210\u4e0d\u6cbe\u932b\/\u4e0d\u6f64\u6fd5(Non-Wetting)\u7684\u73fe\u8c61\u3002<\/font><\/p>\n

\u6240\u4ee5\u5f71\u97ff\u710a\u932b\u6f64\u6fd5\u7684\u56e0\u7d20\u70ba\u300c\u6eab\u5ea6\u300d\u8207\u300c\u6c27\u5316\u300d\u7a0b\u5ea6\u3002<\/strong><\/font><\/p>\n

\u8acb\u6ce8\u610f\uff1a\u9019\u88e1\u7684\u6eab\u5ea6\u6307\u7684\u662f\u8981\u932b\u818f\u8207\u9700\u8981\u751f\u6210\u710a\u63a5\u4f4d\u7f6e\u7684\u6eab\u5ea6\uff0c\u65e2\u4f7f\u74b0\u5883\u6eab\u5ea6\u5df2\u7d93\u9054\u5230\u4e86\u878d\u932b\u6eab\u5ea6\uff0c\u4f46\u9700\u8981\u710a\u63a5\u7684\u4f4d\u7f6e\u5982\u679c\u4ecd\u7136\u672a\u8d85\u904e\u5176\u8868\u9762\u80fd\u7684\u6eab\u5ea6\uff0c\u5c31\u6703\u767c\u751f\u932b\u818f\u878d\u5316\u4e86\u4f46\u537b\u6d41\u52d5\u5230\u9130\u8fd1\u5df2\u7d93\u710a\u588a\u6216\u96f6\u4ef6\u710a\u8173\u6eab\u5ea6\u5df2\u7d93\u4e0a\u5347\u5230\u8d85\u904e\u8868\u9762\u80fd\u7684\u4f4d\u7f6e\u3002<\/font><\/p>\n

\u6240\u4ee5\u6709\u6642\u5019SMT\u5de5\u5ee0\u6703\u6709\u67d0\u4e9b\u710a\u932b\u4e0d\u826f\u7684\u73fe\u8c61\u662f\uff1a\u710a\u932b\u5168\u90e8\u96c6\u4e2d\u5728\u96f6\u4ef6\u8173\u6216\u662f\u5168\u90e8\u96c6\u4e2d\u5728PCB\u710a\u588a\u7684\u4f4d\u7f6e\uff0c\u800c\u5176\u4ed6\u5730\u65b9\u5247\u6c92\u6709\u710a\u932b\uff0c\u5c31\u662f\u6709\u4e00\u65b9\u7684\u8868\u9762\u8655\u7406\u53ef\u80fd\u5df2\u7d93\u6c27\u5316\uff0c\u9020\u6210\u5176\u8868\u9762\u80fd\u5347\u9ad8\uff0c\u7576\u4e00\u65b9\u53ef\u4ee5\u5403\u932b\uff0c\u53e6\u4e00\u65b9\u4e0d\u80fd\u5403\u932b\uff0c\u5c31\u6703\u5f62\u6210\u9019\u6a23\u7684\u7f3a\u9677\u3002<\/font><\/font><\/p>\n

\u53e6\u5916\u4e00\u500b\u73fe\u8c61\u662fPCB\u7684\u710a\u588a\u4e0a\u92ea\u8a2d\u4e86\u5927\u9762\u7a4d\u7684\u9285\u7b94\uff0c\u9285\u7b94\u9762\u7a4d\u8d8a\u5927\u5c31\u9700\u8981\u4f9b\u7d66\u66f4\u591a\u7684\u71b1\u80fd\u624d\u80fd\u4f7f\u5176\u6607\u6eab\uff0c\u53ef\u662f\u96f6\u4ef6\u8173\u56e0\u70ba\u76f4\u63a5\u66b4\u9732\u5728\u74b0\u5883\u5927\u6c23\u4e2d\uff0c\u6240\u4ee5\u6607\u6eab\u5f88\u5feb\uff0c\u9019\u6642\u5019\u5982\u679c\u56de\u710a\u7210\u7684\u6eab\u5ea6\u66f2\u7dda\u8abf\u5f97\u4e0d\u5920\u597d\uff0c\u677f\u5b50\u9032\u5ea6\u56de\u710a\u5340(reflow zone)\u524d\u5f7c\u6b64\u7684\u6eab\u5dee\u592a\u5927\uff0c\u4e5f\u6703\u9020\u6210\u710a\u932b\u5168\u90e8\u8dd1\u5230\u96f6\u4ef6\u8173\u7684\u60c5\u5f62\uff0c\u6240\u4ee5\u6709\u4e9bPCB \u6703\u7279\u610f\u5728\u9019\u7a2e\u710a\u588a\u4e0a\u8a2d\u8a08\u71b1\u963b(Thermal Relief)<\/a>\u4f86\u964d\u4f4e\u5176\u5f71\u97ff\u3002<\/font><\/p>\n

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

\u8acb\u6ce8\u610f\uff01\u4ee5\u4e0a\u89c0\u5ff5\u53ea\u662f\u500b\u4eba\u5fc3\u5f97\uff0c\u4e0d\u898b\u5f97\u90fd\u662f\u6700\u6b63\u78ba\uff0c\u670d\u7528\u524d\u8acb\u4e09\u601d\uff5e<\/font><\/font><\/p>\n

\n

\u5ef6\u4f38\u95b1\u8b80\uff1a<\/font>
\u8ff4\u6d41\u710a\u7684\u6eab\u5ea6\u66f2\u7dda Reflow Profile<\/font><\/a>
\u5982\u4f55\u6311\u9078\u932b\u818f (Solder paste selection)<\/font><\/a>
\u96fb\u8def\u677f\u4e0a\u5e38\u898b\u7684\u710a\u932b\u7f3a\u9ede\u4e2d\u82f1\u6587\u5c0d\u7167\u8207\u89e3\u91cb<\/font><\/a>
BGA\u865b\u710aNWO(Non-Wet-Open)\u5f62\u6210\u7684\u539f\u56e0\u53ca\u53ef\u80fd\u89e3\u6c7a\u65b9\u6cd5<\/font><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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