Electronics Forum | Fri Dec 13 10:31:51 EST 2019 | ameenullakhan
Dear Alex, thanks for the machine link. And valuable feedback. We cant change the solder paste. Its a for defense and aerospace projects. Customer won't agree on it . We have major issue in ROL0 Flux classified solder paste. cannot go for aggress
Electronics Forum | Fri Dec 13 10:33:27 EST 2019 | ameenullakhan
Dear Dave, We cant change the solder paste. Its a for defense and aerospace projects. Customer won't agree on it . We have major issue in ROL0 Flux classified solder paste. cannot go for aggressive flux chemistry. So need a good method to hold th
Electronics Forum | Wed Dec 11 06:47:33 EST 2019 | ameenullakhan
Dear Friends, Need your valuable feedback on how to identify the component is ok or not for manufacturing. Issue : We have parts which are more than 5 years old.And management want us to qualify this parts for production. We presently use below me
Electronics Forum | Tue Feb 15 21:27:18 EST 2005 | davef
Component shelf life depends on: * Solderability protection type. * Quality of process and materials used in applying solderability protection. * Duration of time from when the solderability protection was applied. * Packaging used in component stor
Electronics Forum | Thu Aug 29 07:21:28 EDT 2002 | nifhail
What are other testing/process step that we should do if we where to use the old date code QFPs other than solderability and baking ? What is the plating composition normally %? lead, % tin etc. I have my policy not to accept the more than 12 mont
Electronics Forum | Thu Aug 29 17:45:54 EDT 2002 | nifhail
What are other testing/process step that we should do if we where to use the old date code QFPs other than solderability and baking ? What is the plating composition normally %? lead, % tin etc. I have my policy not to accept the more than 12 mont
Electronics Forum | Fri Apr 23 17:59:54 EDT 2010 | hegemon
Therein lies the issue. Unknown storage conditions before we received the PCBs, date codes just expired (2 weeks), first article is de-lam city! Had a bad feeling about it. Have read some studies showing that there is no linear tie in of visual cha
Electronics Forum | Fri Sep 13 09:02:52 EDT 2002 | tvielhaber
A distributor has some smt components (QFP) packaged in a vacuum sealed package with a 1991 date code. Should I accept these parts? What are the main issues I need to be concerned about? Solerability, moisture? Won't the vaccum seal package minim
Electronics Forum | Wed Feb 09 21:41:27 EST 2000 | Dave F
Jack: You should use your components promptly. Don't store 'em, only bad things will happen to them. 1 You should store all your components, not just your SMD reeled components, so they are not damaged or their solderability decreased. Check the
Electronics Forum | Wed Apr 08 11:33:51 EDT 2009 | 1036
2) STD FR4 material with HASL finish, 4 layer board. Reflowed under tin-lead temps with another 4 layer board same time(no delamination problem). 3) We uasualy do not pre-bake board unless board is too old. 4) We do not have the board on hand right
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