65 ipc a-600 results

Electronics Forum: ipc a-600 (Page 5 of 7)

Re: bowtwist

Electronics Forum | Wed Jul 21 20:52:52 EDT 1999 | Scott

| | I have pcb's in which i am experiencing warping. | | the boards are 12.8125" on a diagonal measurement. | | they are out approximatley .010". | | the boards are combination thru-hole,smt, they also have 3ounce copper.what is acceptable,and what i

Re: bowtwist

Electronics Forum | Thu Jul 22 06:54:45 EDT 1999 | Earl Moon

| | | I have pcb's in which i am experiencing warping. | | | the boards are 12.8125" on a diagonal measurement. | | | they are out approximatley .010". | | | the boards are combination thru-hole,smt, they also have 3ounce copper.what is acceptable,an

White spots on PCB

Electronics Forum | Mon May 14 22:24:11 EDT 2001 | davef

The time over liquidous of the profile seems short. But then again, who knows? Based on what you told us, I'm guessing at a board fabrication problem, either measling or delamination. Probably the former, rather than the latter. [Now, we remember

Re: Second wave elimination

Electronics Forum | Sat Feb 05 09:13:39 EST 2000 | Dave F

Hany: In response to your questions: 1- In a double wave solder M/C, is possible to completely eliminate the second wave without affecting the quality of the solder joints? Many w/s machines have a turbulent wave and a smooth wave. The turbule

Re: PCB delamination

Electronics Forum | Mon Feb 05 17:18:53 EST 2001 | davef

Wha, Nellie!!! Delamination & Blistering IPC-A-600D Although it may occasionally occur because of a severe process breakdown, delamination and blistering occurs as a result of an inherent weakness of the material. Either condition represents a brea

Re: Bow and Twist of PCB's

Electronics Forum | Wed Aug 19 12:20:24 EDT 1998 | MARK J.

| Hi there, | I'm actually facing a lot of trouble with PCB's presenting up to 3mm of bow /twist at reception i.e. before assembly. The PCB size is 220 by 230mm. The boards are to be assembeled SMD double sides with 05.mm pitch on both sides. In orde

Re: haloing on SMT PCBs

Electronics Forum | Mon Jun 08 15:00:08 EDT 1998 | Earl Moon

| I work QA at an OEM in Alberta, Canada. I saw earlier posts on the smtnet regarding PCB haloing criteria. I am currently in a dispute with my PCB vendor over the acceptability of haloing (delamination) around plated through holes and vias on a lot

Re: haloing on SMT PCBs

Electronics Forum | Mon Jun 08 15:01:02 EDT 1998 | D.Lange

Re: Suspected Pink Ring

Electronics Forum | Tue Jul 27 17:47:36 EDT 1999 | Earl Moon

| While inspecting incoming PCBs we detected around all plated-through-holes (only there and all in the same place) some halfmoonshaped light rings that match obviously only with the pink ring symptom shown in the IPC-A-600 chapter 2.5.2.. That would