Electronics Forum: chip on board process (Page 1 of 70)

Non-wettig on chip cap.

Electronics Forum | Thu Dec 06 23:34:25 EST 2001 | Beny

Pls. help. I�ve problem with non-wetting defect at capacitor termination. I have faced this problem at the 2 kinds of termination. One is chip capacitor 0603 that its outer termination surface composed with 100 Sn (Lead free) and another one is Sta

Non-wettig on chip cap.

Electronics Forum | Fri Dec 07 10:56:24 EST 2001 | franciscoioc

HI, I exeperience this problem before and I tried diferent type of solder pastes.The one that help my process is a Kester solder R596L OA this is a water soluble paste that i am very sure is going to help you.You can get the technical data at http:/

Non-wettig on chip cap.

Electronics Forum | Fri Dec 07 13:15:45 EST 2001 | slthomas

We've experienced similar problems with film caps, specifically Panasonic's parts that are alledgedly compatible with both reflow and wave soldering. They are identified with either GB or JB p/n suffixes, which become either GX, GC, or JC for the ref

components don't fit on board

Electronics Forum | Wed Dec 12 09:46:32 EST 2012 | rway

You can go with smaller chip parts (0805 to 0603 or smaller). What size is D1? Can you go to a smaller package. Provide more details. You may not have the real estate to include the silksreen (i.e. reference designators). Consider omitting them.

solder skips in chip wave on a NU/ERA wave solder

Electronics Forum | Mon May 25 21:10:28 EDT 2009 | padawanlinuxero

Hello !! I have a problem with my wave solder oven, in one of the products we made has connectors on one side of the pcb and in the other one has SMT components the process is kinda tricky on the SMT components we use an adhesive and put to the refl

Questions on underfill process

Electronics Forum | Fri Jun 08 07:52:13 EDT 2007 | zanolli

We are looking at a specialized method of direct soldering ceramic circuit modules (maybe 40mm square) to a mother board with solder joints on only 2 of the 4 sides. These modules would be oriented horizontally, or mezzanine like, to the mother board

smt on flexible board

Electronics Forum | Sun Dec 19 10:02:55 EST 1999 | ron chua

Hi, how to ensure flexible boards do not warp after reflow and still remain flat for subsequent operations. What is the best way to hold and transport these strips from one process to another. Thanks!

Re: Chip on board - board metalization

Electronics Forum | Tue Jan 09 13:19:40 EST 2001 | Rob K

Anyone want to convert to microns rather than micro inches? .... or would furlongs be better?

Re: Chip on board - board metalization

Electronics Forum | Mon Jan 08 20:28:54 EST 2001 | Dave F

Consider the recommendations of J-STD-012 as the baseline for your efforts.

Chip on board - board metalization

Electronics Forum | Mon Jan 08 07:46:52 EST 2001 | Juliano Vasconcelos

Hello everybody ! I�ve known thickness of gold over nickel board of chip on board (COB) boards are between 5 �n 15 microinches. A supplier suggested 1 to 4 microinches of gold over nickel ! Have someone any expierince about it ? I�m glad if you help

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