Electronics Forum | Mon Sep 11 04:23:49 EDT 2000 | Wolfgang Busko
Adam: I would say that you do have a reliability problem. - check parts for solderability - check your board finish - check your profiles - check your paste - check your processes with focus on cleanliness - do some mechanical tests, you should rath
Electronics Forum | Mon Aug 28 15:59:43 EDT 2000 | Tom Humphrey
Can any one give me a list or recommendations of board assembler / manufacturers (Southeast U.S. prefered) who could handle assembly of 2 inch x2 inch PWB with 100+ surface mount components. No testing required. I would appreciate any help or recomen
Electronics Forum | Tue Aug 22 14:02:02 EDT 2000 | JAX
Caumel, You should be able to find sufficient info in the archives. Solder Balls probably hold the majority of posts and should be easy to referance. You can find out what causes them in relation to board material, profile tempature, wave type, flu
Electronics Forum | Mon Aug 21 19:35:51 EDT 2000 | Dave F
Kyung Sam Park: Sure, several causes of plastic QFP package delamination, other than humidity absorption, are: * Corrosion on component leads * CTE mismatch between leads and package materials * Package material adhesion strength degradation Wh
Electronics Forum | Wed Aug 16 03:04:50 EDT 2000 | rberry
Hi Does anyone have a tried and tested method of estimating the mass of solder paste that will be used for an SMD assembly given only the type and quantity of components used. (As well as type of paste, stencil thickness etc) In other words is there
Electronics Forum | Thu Aug 17 09:08:16 EDT 2000 | Wolfgang Busko
In this case a marking of some kind that clearly distinguishes between those different parts is essential. Different stocknumber for example will do and can only be trusted if measurements like in this case do not give 100% clearness. If you have the
Electronics Forum | Fri Aug 04 16:54:06 EDT 2000 | John Thorup
This is not that unusual. Most manufacturers have a number of optional lead configurations available, including a standoff kink. It is sometimes difficult with low quantities or with a lazy distributor. Get a complete spec catalog for the componen
Electronics Forum | Thu Aug 03 15:18:40 EDT 2000 | bzark
You may also consider different sizes of, off the shelf, Dry Box. i.e Seika McDray (http://www.seikausa.com/)as an alternative to N2. It is mobile, no N2 hard piping, less operating expence and actually can remove moisture while storing. good luck!
Electronics Forum | Tue Jul 25 03:30:26 EDT 2000 | gary
We got PLCC 68 components on our new products and we are not sure on what feeder pitch we are going to use for the said part as we do not have 44mm feeders. Can anyone there help me what feeders are they using for the said parts so we won't end up bu
Electronics Forum | Tue Jul 25 20:41:01 EDT 2000 | Dave F
Gary: I agree with P that 44x24mm is more common, but yano, every single time I buy a fixed pitch feeder trying to get heads-up on an assembly requirement, it ends-up being the wrong pitch. Is it possible that your future component supplier might b
