Electronics Forum | Tue Mar 20 20:14:40 EST 2001 | davef
Electroplating [electrolytic] and dipping [HASL] are the two methods for applying solder coatings to features on boards. Disadvantages of electroplating lead / tin are: * "Weak knees" created at the edge of plated through holes. [I used to get weak k
Electronics Forum | Thu Mar 22 03:26:42 EST 2001 | moseschee
Hi Dave, Thank you for your reply.It means a lot to me. By the way, is it possible to have the analysed data on the study you mentioned regarding the solderability "conditioning " ? Can we establish the correlation of solder shelf life based on y
Electronics Forum | Thu Mar 22 15:44:50 EST 2001 | pteerink
I have a board with QFP240 plastic package exhibiting the same characteristics. Minimum heel fillet that doesn't change with stencil mods, paste change, profile change etc ( I am working to class 2, though, so my pass spec, although they are not pret
Electronics Forum | Thu Mar 22 15:45:20 EST 2001 | pteerink
I have a board with QFP240 plastic package exhibiting the same characteristics. Minimum heel fillet that doesn't change with stencil mods, paste change, profile change etc ( I am working to class 2, though, so mine pass spec, although they are not pr
Electronics Forum | Mon Mar 26 20:55:16 EST 2001 | davef
Two things: 1 IPC pad calculator is an excellent resource for you and your board layout staff. Consider that working together with the calculator may allow you both an opportunity to balance your interests. 2 It's unlikely that the ceramic parts h
Electronics Forum | Tue Mar 27 02:57:32 EST 2001 | Ken S.
Have you a reflow oven that has upper and lower heaters? Have you a reflow oven that uses hot air as well as elements to control the transfer of heat to various areas? If yes to these, I would suggest increased air flow or change in direction of
Electronics Forum | Thu Mar 22 17:49:13 EST 2001 | davef
Sure. We use 9999 for our operator level security. We use a secret number [that we change periodically] for our next level of security, because we don't want people messing with our profiles. And we use an ever more secret number for our next leve
Electronics Forum | Thu Mar 22 17:33:38 EST 2001 | davef
Steve, IPC TM-650 Test Methods Manual is a load. IPC TM-650 Test Methods Manual: Section 2.1 Visual Test Methods Section 2.2 Dimensional Test Methods Section 2.3 Chemical Test Methods Section 2.4 Mechanical Test Methods Section 2.5 Electrical Test M
Electronics Forum | Wed Mar 28 00:20:48 EST 2001 | chinaren
we use the screen glue AMICON D125 F5 from Emerson company of Belgium and stencil is Varidot stencil from Loctite with thickness of 250 micrometers The squeegee is also from loctite, previously we use squeegee of material PU, it is easy to be broke
Electronics Forum | Mon Mar 26 15:50:57 EST 2001 | jsmith01
Does anyone know who makes, or were to get a finger-actuated switch for a pneumatic dispenser? I used one years ago at a different company but for the life of me I cannot remember who makes it. I have looked in the typical places - Contact east, Te
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