Electronics Forum | Fri Jan 15 16:55:50 EST 1999 | Chrys
| | | Hello, | | | | | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | | | | | So far, the tests I can think of performin
Electronics Forum | Thu Nov 19 08:20:04 EST 1998 | Earl Moon
| | | | For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wave so
Electronics Forum | Thu Nov 19 09:01:00 EST 1998 | Dave F
| | | | | For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wave
Electronics Forum | Mon Jan 08 20:57:52 EST 2001 | Dave F
Are you talking about bare board cleanliness or assembly level cleanliness? Bare board cleanliness is still primarily measured by resistivity of solvent extract (ROSE) using instruments such as Omegameters and Zero Ions. What is considered as "acce
Electronics Forum | Tue Jun 26 19:48:29 EDT 2001 | davef
Information a SIR test vehicle can be found in IPC-9201, SIR Handbook [http://www.ipc.org]. Common test boards are: * IPC-B-24 (copper and HASL, FR-4 and polyimide) * IPC-B-36 (bare copper and HASL, FR-4 and polyimide) * IPC Phoenix board (bare copp
Electronics Forum | Wed Jun 02 09:50:00 EDT 1999 | Earl Moon
| Hello all | I have a question concerning whether or not there is any special requirements to follow for assembly of a Polyimide PCB card. The customer has the following information on there documentation but since we have never built anything with
Electronics Forum | Tue Apr 13 04:54:53 EDT 1999 | Charles Stringer
| | DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | | | I use tweezers and picks. I place the component down on it's backside (legs up) and manually twe
Electronics Forum | Tue Apr 13 12:36:57 EDT 1999 | Scott McKee
| | | DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | | | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | | | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | | | | | I use tweezers and picks. I place the component down on it's backside (legs up) and ma
Electronics Forum | Fri Jan 15 17:13:07 EST 1999 | Earl Moon
| | | | Hello, | | | | | | | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | | | | | | | So far, the tests I can think of
Electronics Forum | Mon Nov 22 17:32:34 EST 2004 | davef
Assemblers often assume that the board and component suppliers provide them with clean product. This was not a problem when everyone used water washable fluxes, because the water washing used to clean the flux residues also cleaned the board and com
