Electronics Forum | Sun May 24 06:02:33 EDT 1998 | Earl Moon
| Hello, | I am looking for suggestions for cleaning pcb's after the routing (fabrication) process. Keep in mind that these pcb do not have components intalled on them yet. | We have considered pre-drilling the routing plunge points, but cost and ca
Electronics Forum | Sat Mar 21 12:10:03 EST 1998 | Philip C. Kazmierowicz
| Cpk's on top flight ovens (e.g., Conceptronics, Heller, Electrovert, Vitronics) vary wildly, from 1 to 2+, between different supplers. The suppliers don't seem to understand Cpk's. A supplier's rep whose oven has a Cpk of 1.0 told me: | 1. Cpk's
Electronics Forum | Sat Mar 21 16:33:09 EST 1998 | Earl Moon
| | | Cpk's on top flight ovens (e.g., Conceptronics, Heller, Electrovert, Vitronics) vary wildly, from 1 to 2+, between different supplers. The suppliers don't seem to understand Cpk's. A supplier's rep whose oven has a Cpk of 1.0 told me: | | 1.
Electronics Forum | Fri Feb 27 10:54:38 EST 1998 | Earl Moon
REVISITING MULTILAYER DIMENSIONAL STABILITY AND LAMINATE INTEGRITY It has been said we must learn it all over again and again about every four years. I know Lee Ritchey said that to me about high speed digital circuit design. The same seems true for
Electronics Forum | Thu Jan 23 20:57:33 EST 2003 | davef
If the flux was not activated (ran in another area of the board), the flux should be removed from the board. Any Comments? A: We agree. In order for its �benigness� to take effect, NC flux is affected by: * Type of flux * Amount of flux * Proper ac
Electronics Forum | Wed Dec 15 16:38:42 EST 2004 | patrickbruneel
Here's my 10 cents Studies done in the 1980's concluded that pure tin was prone to whisker generation. A tin content lower then 70% became exempt from this phenomenon. I have never seen or done any studies on the impact lead had in reducing the pote
Electronics Forum | Thu Nov 03 14:43:19 EST 2005 | chunks
Hmmmm.... We never had to change any parameters when switching over to Gels. And no, we don't let the operators have kitty-wampus on our programs either. The Gels did get rid of broken parts. We have Run Orders of about 50 pieces. We change over
Electronics Forum | Wed Nov 02 17:49:07 EST 2005 | grantp
Hi, We used a batch oven from Reddish Electronics out of the UK. It was convection, and ok, but had limitations. Batch convection ovens start to heat up, so the metal of the oven is hotter and hotter and it effects the profile. So we ended up need
Electronics Forum | Fri Jan 05 12:17:31 EST 2007 | Cmiller
Our first pass yield across all our products is above 95% but we include anything that does not meet IPC standards. Probably 75% of our failures are not electrical. AOI is a great tool to get a consistent measure of your process. I dont know how anyo
Electronics Forum | Tue Aug 26 16:24:18 EDT 2008 | rway
We currently use a YesTech M1 system and we are looking to buy another. Two important areas to look at when pursuing AOI equipment: 1) Camera resolution 2) Light sources Depending on your needs, camera resolution can be important depending on the si
