免洗焊剂测试SIR(表面绝缘电阻),IPC-004标准非常强调SIR和电迁移测试。有些免洗锡膏离子污染测试从来没有合格过,但是SIR测试合格,而且用在产品(PCBA)上多年也没有问题。水洗工艺用水洗焊剂,腐蚀性较强,需要清洗后测试离子污染,并且作为工艺控制手段,美军标mil-28809有明确规定。主要是焊剂中活性剂不同。 -- 吴波 [log in to unmask] 13602585865 在2010-03-25 11:57:25,"孙该贤" <[log in to unmask]> 写道: 吴工: 以下意见有没有在哪份标准中有明文规定或是定义?为什么免清洗的即使离子污染超标不会有影响?我们一直有这个困惑.客户一直要求做测试无论是哪种清洗. Sunny Amphenol Tel: 86-20-3483-9838 Fax: 86-20-3483-9800 Email: [log in to unmask] 发件人: TGAsia [mailto:[log in to unmask]] 代表 wubosz 发送时间:2010年3月25日 星期四 11:40 收件人:[log in to unmask] 主题: Re: [TGAsia] 如何改善PCBA的表面 清洁度(请能做IC Test i ng 的专业实验室帮忙) 如果是免洗工艺,如免洗锡膏、免洗波峰焊剂,没有必要测试离子污染,因为即使离子污染超标,产品的可靠性也没有问题;如果是水清洗工艺,必须测试离子污染。 -- 吴波 [log in to unmask] 13602585865 在2010-03-25 09:41:26,"Frank Xiong" <[log in to unmask]> 写道: > >不好意思,改一下主题。 > >-----Original Message----- >From: Frank Xiong [mailto:[log in to unmask]] >Sent: Thursday, March 25, 2010 9:39 AM >To: 'Asia Committe Task Group Forum' >Subject: RE: [TGAsia] 答复: [TGAsia] PCB阻焊剂的涂覆 > > >大家好: > >请教大家一个问题:我们现在正请实验室用Omega Meter 600 SMD 来测试PCBA的离子污 >染度, 现想请教是否有那家专业实验室可以提供现场技术服务 / 同我们一起分析 可 >以做到“怎么样才能让PCBA离子污染度低“,也就是说让PCBA的表面洁净!!如果有测 >试结果超标,可以帮我们分析到是哪些制程会有影响!!谢谢!! > >We are doing an IC testing using Omega Meter 600 SMD from one testing lab, >are there any professional testing labs to provide an "On Site Supervision >Service" to help us achieve the final target: The cleanliness level of PCBA >can meet GE custome requirment. Thanks for all of your help to provide such >info. > >Best regards, >Frank Xiong >Quality Manager >Trio Engineering Co., Ltd. >Tel.: (86) 20-8490 2933 Ext.257 >Fax: (86) 20-8490 2273 >Mobile: (86) 158 1718 6845 >Email: [log in to unmask] >Web : www.triohk.com.hk > >______________________________________________________________________ >This email has been scanned by the MessageLabs Email Security System. >For more information please contact helpdesk at x2960 or [log in to unmask] >______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________