Electronics Forum | Tue Aug 03 16:52:41 EDT 2004 | Dreamsniper
Hi, What contributes to the above? I've got some BGA solder joints with a crystal like flux attached to it like a mini solder ball but do not have a perfect round shape. I had my aqueous cleaner's DI water sent for analysis and everything looks okay
Electronics Forum | Thu Aug 05 21:47:35 EDT 2004 | KEN
Agreed. Joint failure can happen when un-bagging or durig box-build (at customer site). Careful handling should be used. In one case I had boards returned to me for evaluation and failure analysis. Too bad our site never built the boards!!! (jacka
Electronics Forum | Fri Aug 06 21:43:40 EDT 2004 | KEN
In my wiper paper travels I discovered that many different brands are simply "repackaged" from a single manufacturer. Look at fiber size, weave and porosity. In one case two paper were identical, just dyed green. The prices ranged from 26 dollars
Electronics Forum | Mon Aug 16 13:31:45 EDT 2004 | Dreamsniper
We do not have problems with preheating. before we used to suspect that the cause of tombstone was that because the semi-auto and manual version do not have pre-heat stage. We had 1 with an IR heater and it is quite okay. you can use it too to cure a
Electronics Forum | Tue Aug 24 05:02:55 EDT 2004 | dj_jago
Hiram, We have just had the same decision to make! I was at Vitronics Soltec, Holland about 4 weeks ago doing trials for Lead Free. The Soltec Delta machine was ultimatly chosen over price verses performance. Both machines are very capable but
Electronics Forum | Wed Aug 18 20:09:45 EDT 2004 | df_indy
Hello, We want to build in-house cross sectioning capability. I have a general idea of the process and equipment required, but I do not know any brand names to start with. I wish I had written down the equipment model name when I visited our suppli
Electronics Forum | Tue Aug 24 21:28:26 EDT 2004 | KEN
Here's one for ya' Purchasing buys SMT RJ45 connector parts on gray market in reels....reels that are 36 inch diameter! The pendilum swings the other way... Purchasing needs 10,000 resistors. They buy 20 (500 count) reels! I don't know about the
Electronics Forum | Fri Sep 24 13:38:16 EDT 2004 | Nick Prince
The re-use of any component has commercial implications as weel. If you check the data sheet for the component in question you will find the reflow profile, usually there will be a "Max No of Reflows". I have never seen this number higher than 2. If
Electronics Forum | Wed Sep 01 16:16:17 EDT 2004 | DenisM
Hi, I have used these type systems in the past and had trouble with white residue and flux removal under low standoff components. All cleaning systems need DI water and this requirement adds another layer of system cost if you don't have DI availabl
Electronics Forum | Tue Sep 07 15:11:35 EDT 2004 | Dreamsniper
It's been a while since BGA usage become widespread. Ton's of articles had been written with regards to design, processing, techniques, inspection etc...but it seems like there's still no hard ground for standards and IPC 7095 doesn't cover everythin
