{"id":9744,"date":"2025-11-04T07:48:18","date_gmt":"2025-11-04T07:48:18","guid":{"rendered":"https:\/\/www.besterpcba.com\/?p=9744"},"modified":"2025-11-05T06:09:48","modified_gmt":"2025-11-05T06:09:48","slug":"qfn-thermal-pad-rework-patterns","status":"publish","type":"post","link":"https:\/\/www.besterpcba.com\/zh_hk\/qfn-%e7%86%b1%e8%86%8f%e4%bf%ae%e5%be%a9%e5%9c%96%e6%a8%a3\/","title":{"rendered":"\u53ef\u4ee5\u91cd\u65b0\u4fee\u6b63\u7684QFN\u71b1\u588a\u81a0\u9ede\u5716\u6848"},"content":{"rendered":"<p>\u5728\u5bc6\u96c6\u985e\u6bd4\u96fb\u8def\u677f\u4e0a\u91cd\u5de5\u4f5c\u5931\u7684QFN\u5c01\u88dd\u4e0d\u61c9\u5371\u53ca\u6574\u9ad4\u7d44\u4ef6\u3002\u592a\u591a\u6642\u5019\uff0c\u7d50\u679c\u537b\u5982\u6b64\u3002\u539f\u56e0\u5728\u65bc\u8a2d\u8a08\u53ea\u70ba\u521d\u59cb\u7d44\u88dd\uff0c\u800c\u975e\u96f6\u4ef6\u66f4\u63db\u7684\u73fe\u5be6\u3002\u5be6\u5fc3\u958b\u53e3\uff08depositing a thick layer of 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alt=\"\u6bd4\u8f03QFN\u71b1\u588a\u7684\u5be6\u5fc3\u65b9\u5f62\u6a21\u677f\u958b\u53e3\u8207\u7a97\u683c\u683c\u5b50\u6a21\u677f\u958b\u53e3\u7684\u4e26\u6392\u5716\u50cf\u3002\" title=\"QFN\u7684\u5be6\u5fc3\u8207\u7a97\u683c\u6a21\u677f\u958b\u53e3\"\/><figcaption 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class=\"wp-block-heading\" id=\"voiding-from-trapped-flux-volatiles\">\u7531\u65bc\u6c23\u76f8\u6ce1\u7559\u5b58\u800c\u5f62\u6210\u7684\u7a7a\u6d1e<\/h3>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.besterpcba.com\/wp-content\/uploads\/2025\/11\/solder-voiding-in-thermal-pad.jpg\" alt=\"QFN\u710a\u9ede\u7684X\u5149\u5716\u50cf\uff0c\u986f\u793a\u710a\u6599\u4e2d\u7684\u5927\u9ed1\u5708\uff0c\u4ee3\u8868\u7a7a\u6d1e\u6216\u88ab\u56f0\u7684\u6c23\u6ce1\u3002\" title=\"\u71b1\u588a\u4e2d\u710a\u6599\u7a7a\u6d1e\u7684X\u5149\u5716\u50cf\"\/><figcaption class=\"wp-element-caption\">\u88ab\u56f0\u7684\u52a9\u710a\u5291\u63ee\u767c\u7269\u5728\u5927\u578b\u710a\u9ede\u5167\u5f62\u6210\u7a7a\u6d1e\uff0c\u7834\u58de\u4e86\u71b1\u548c\u6a5f\u68b0\u5b8c\u6574\u6027\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u7576\u6c23\u9ad4\uff08\u4e3b\u8981\u4f86\u81ea\u6c23\u5316\u7684\u52a9\u710a\u5291\uff09\u88ab\u56f0\u5728\u56fa\u5316\u7684\u710a\u6599\u4e2d\u6642\uff0c\u5c31\u6703\u5f62\u6210\u7a7a\u6d1e\u3002\u5728\u8a2d\u8a08\u826f\u597d\u7684\u63a5\u9ede\u4e2d\uff0c\u9019\u4e9b\u63ee\u767c\u6027\u7269\u8cea\u6703\u5728\u710a\u6599\u51dd\u56fa\u524d\u9038\u51fa\u3002\u4f46\u5728\u5927\u578b\u3001\u5be6\u5fc3\u7684\u71b1\u588a\u4e2d\uff0c\u5e7e\u4f55\u5f62\u72c0\u53cd\u800c\u4e0d\u5229\u65bc\u6b64\u3002\u96a8\u8457\u710a\u818f\u91cd\u65b0\u6d41\u52d5\uff0c\u6c23\u5316\u7684\u52a9\u710a\u5291\u7522\u751f\u58d3\u529b\u3002\u5982\u679c\u63a5\u9ede\u662f\u8f03\u5c0f\u5cf6\u5dbc\u7684\u683c\u5b50\uff08\u7a97\u683c\u5716\u6848\uff09\uff0c\u6c23\u9ad4\u53ef\u4ee5\u8f15\u6613\u5730\u9077\u79fb\u5230\u908a\u7de3\u4e26\u9038\u51fa\u3002\u5728\u5927\u578b\u9023\u7e8c\u8cea\u91cf\u4e2d\uff0c\u901a\u5411\u908a\u7de3\u7684\u8def\u5f91\u904e\u9577\u3002\u878d\u5316\u7684\u710a\u6599\u8868\u9762\u5f35\u529b\u6703\u56f0\u4f4f\u6c23\u9ad4\uff0c\u7576\u63a5\u9ede\u51b7\u537b\u6642\uff0c\u5f62\u6210\u7a7a\u6d1e\u3002<\/p>\n\n\n\n<p>\u8fd4\u5de5\u6703\u4f7f\u9019\u500b\u554f\u984c\u8b8a\u5f97\u66f4\u7cdf\u3002\u5df2\u7d93\u7d93\u904e\u4e00\u6b21\u56de\u6d41\u5faa\u74b0\u7684\u63a5\u9ede\uff0c\u5df2\u6d88\u8017\u4e86\u5927\u90e8\u5206\u52a9\u710a\u5291\u3002\u518d\u6b21\u52a0\u71b1\u6642\uff0c\u5269\u9918\u7684\u52a9\u710a\u5291\u6703\u88ab\u6fc0\u6d3b\uff0c\u4f46\u52a9\u710a\u5291\u7684\u5269\u9918\u91cf\u8f03\u5c11\uff0c\u96e3\u4ee5\u4fc3\u4f7f\u710a\u6599\u51dd\u805a\u4e26\u91cb\u653e\u88ab\u56f0\u4f4f\u7684\u6c23\u9ad4\u3002\u8fd4\u5de5\u52a0\u71b1\u901f\u5ea6\u4e5f\u6bd4\u6b63\u5e38\u751f\u7522\u56de\u6d41\u66f4\u5feb\u3001\u8f03\u4e0d\u5747\u52fb\uff0c\u5f62\u6210\u71b1\u68af\u5ea6\uff0c\u52a0\u5287\u6c23\u9ad4\u56f0\u4f4f\u73fe\u8c61\u3002\u7d50\u679c\u662f\u7a7a\u6d1e\u66f4\u52a0\u56b4\u91cd\u3002<\/p>\n\n\n\n<p>\u9019\u4e0d\u50c5\u50c5\u662f\u5916\u89c0\u7f3a\u9677\u3002\u5728\u71b1\u588a\u4e2d\uff0c\u7a7a\u6d1e\u6703\u964d\u4f4e\u71b1\u50b3\u5c0e\u7387\uff0c\u589e\u52a0\u5143\u4ef6\u8207\u96fb\u8def\u677f\u4e4b\u9593\u7684\u71b1\u963b\u3002\u5c0d\u65bc\u50cf\u9ad8\u96fb\u6d41MOSFET\u6216\u4f9d\u8cf4\u71b1\u588a\u6563\u71b1\u7684\u7cbe\u5bc6\u985e\u6bd4\u96c6\u6210\u96fb\u8def\u9019\u6a23\u7684\u5143\u4ef6\u4f86\u8aaa\uff0c\u9019\u53ef\u80fd\u6703\u4f7f\u63a5\u9ede\u6eab\u5ea6\u8d85\u904e\u5b89\u5168\u5de5\u4f5c\u9650\u5236\u3002\u8af7\u523a\u7684\u662f\uff0c\u70ba\u4e86\u6700\u5927\u5316\u71b1\u6027\u80fd\u800c\u9078\u64c7\u7684\u5be6\u5fc3\u5b54\u5f91\uff0c\u6700\u7d42\u53ef\u80fd\u56e0\u4fc3\u9032\u7a7a\u6d1e\u5f62\u6210\u800c\u964d\u4f4e\u6027\u80fd\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"microballing-and-paste-displacement\">\u5fae\u7403\u8207\u710a\u818f\u4f4d\u79fb<\/h3>\n\n\n<p>\u904e\u91cf\u710a\u818f\u7684\u53e6\u4e00\u500b\u4e3b\u8981\u5f8c\u679c\u662f\u7194\u878d\u710a\u6599\u7684\u5074\u5411\u4f4d\u79fb\u3002\u9019\u6703\u5728\u5143\u4ef6\u5468\u570d\u7684\u5340\u57df\u51fa\u73fe\u5fae\u7403\u6216\u710a\u7403\u3002\u7576\u5927\u91cf\u7194\u878d\u710a\u6599\u53d7\u5230\u8fd4\u5de5\u5674\u5634\u7684\u58d3\u529b\u6216\u88ab\u56f0\u6c23\u9ad4\u7684\u5287\u70c8\u91cb\u653e\u64fe\u52d5\u6642\uff0c\u90e8\u5206\u710a\u6599\u53ef\u80fd\u5f9e\u63a5\u9ede\u4e2d\u64e0\u51fa\u3002\u5728\u5bc6\u96c6\u7d44\u88dd\u4e2d\uff0c\u9019\u4e9b\u64e0\u51fa\u7684\u710a\u6599\u6703\u843d\u5728\u710a\u818f\u906e\u7f69\u6216\u5143\u4ef6\u710a\u76e4\u4e4b\u9593\uff0c\u56fa\u5316\u6210\u5fae\u5c0f\u7684\u5c0e\u96fb\u7403\u5f62\u9ad4\u3002<\/p>\n\n\n\n<p>\u539a\u7248\uff08\u59826 mils\uff09\u8207\u5be6\u5fc3\u5b54\u5f91\u7684\u7d44\u5408\u4f7f\u9019\u4e00\u554f\u984c\u4e0d\u53ef\u907f\u514d\u3002\u6c89\u7a4d\u7684\u710a\u6599\u91cf\u53ef\u80fd\u8d85\u904e\u710a\u76e4\u7684\u6f64\u6fd5\u9762\uff0c\u5c24\u5176\u662f\u7576\u710a\u76e4\u7531\u710a\u818f\u906e\u7f69\u5b9a\u7fa9\u4e14\u5c0d\u4f4d\u4e0d\u7cbe\u78ba\u6642\u3002\u5728\u56de\u6d41\u671f\u9593\uff0c\u9019\u4e9b\u591a\u9918\u7684\u710a\u6599\u6703\u5728\u63a5\u9ede\u908a\u7de3\u5f62\u6210\u73e0\u72c0\u3002\u5728\u8fd4\u5de5\u904e\u7a0b\u4e2d\uff0c\u5b83\u662f\u6700\u5148\u878d\u5316\u4e14\u6700\u5bb9\u6613\u88ab\u64e0\u51fa\u7684\u6750\u6599\u3002\u5c0d\u65bc\u5177\u6709\u7cbe\u5bc6\u96fb\u963b\u6216\u4f4e\u6cc4\u6f0f\u7bc0\u9ede\u7684\u985e\u6bd4\u677f\u5b50\uff0c\u55ae\u500b\u710a\u7403\u5c31\u53ef\u80fd\u9020\u6210\u77ed\u8def\u6216\u6f0f\u96fb\u8def\uff0c\u7834\u58de\u529f\u80fd\u6027\u3002<\/p>\n\n\n\n<p>\u52a9\u710a\u5291\u672c\u8eab\u4e5f\u53ef\u4ee5\u4f5c\u70ba\u904b\u8f38\u6a5f\u5236\u3002\u5728\u56de\u6d41\u6eab\u5ea6\u4e0b\uff0c\u52a9\u710a\u5291\u8b8a\u6210\u4f4e\u7c98\u5ea6\u6db2\u9ad4\uff0c\u80fd\u5728\u64f4\u6563\u6642\u651c\u5e36\u7194\u878d\u710a\u7c92\u3002\u5b83\u6703\u9032\u5165\u710a\u76e4\u4e4b\u9593\u7684\u72f9\u7a84\u7a7a\u9699\uff0c\u651c\u5e36\u5fae\u5c0f\u710a\u6599\uff0c\u4e26\u5728\u51b7\u537b\u6642\u7559\u4e0b\u5c0e\u96fb\u6c61\u67d3\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"windowpane-aperture-patterns-the-strategic-solution\">\u7a97\u683c\u958b\u53e3\u5716\u6848\uff1a\u7b56\u7565\u6027\u89e3\u6c7a\u65b9\u6848<\/h2>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.besterpcba.com\/wp-content\/uploads\/2025\/11\/windowpane-solder-paste-pattern-on-pcb.jpg\" alt=\"\u986f\u793aQFN\u5143\u4ef6\u4e2d\u592e\u71b1\u588a\u4e0a\u9280\u8272\u710a\u818f\u6c89\u7a4d\u683c\u5b50\u7684\u986f\u5fae\u7167\u7247\u3002\" title=\"PCB\u4e0a\u7684\u7a97\u683c\u710a\u818f\u5716\u6848\"\/><figcaption 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