Electronics Forum | Mon Jan 29 17:45:35 EST 2001 | clem
The general guideline for most PCB manufacturers for PCB thickness tolerance is +/- 10%. Is this documented in an IPC spec? If so which one? Thanks Dave
Electronics Forum | Tue Jan 30 10:19:20 EST 2001 | ibi
I think that tolerance of pcb thickness is described in the �1-2-4 of IPC41-01 (Specification for Base Materials for Rigid and Multilayer Printed Boards Supercedes IPC-L-108, L-109, L-112, L-115, AM-361). Good reading,
Electronics Forum | Mon Apr 09 10:38:26 EDT 2001 | bobbemc
Design parameters are based on tallest components on the bottom side of the PCB. The smallet the component the thinner the floor thickness can be.
Electronics Forum | Thu May 31 15:32:56 EDT 2001 | dspilker
I saw a post from last year that quoted Hadco. For a .062" thick PWB, the remaining material was .012" +/- .002". This is close to what we have been using, but some PwB vendors are now asking for .020" +/-.005". This seems too thick for smooth bre
Electronics Forum | Wed Jun 13 12:54:41 EDT 2001 | Dr. Harry
Does anyone have PCB thickness recomendations for .8 &1.0mm pitch bga's?
Electronics Forum | Thu Oct 07 20:34:48 EDT 1999 | Tony Huang
Hi, Does anybody know what is the minimum gold plating thickness on the PCB goldfinger required by the industrial specifications - IPC, Bellcore, etc. Where can I find the information? Appreciate for the help! Thanks, Tony
Electronics Forum | Fri Sep 21 01:31:13 EDT 2001 | Stoney Tsai
Guys, If there are any specifications or ciriterions for solder paste deposition thickness and volume evaluation. For example, QFP (0.5 mm pitch), 6~8 mils, 3000 mil^3 PLCC: 8~10 mils, ... . . Thanks in advance. Best Regards,
Electronics Forum | Fri Sep 21 10:56:38 EDT 2001 | davef
Not as such. Look at IPC-7525 �Stencil Design Guidelines� The issues are: area and aspect ratios. They relate the size of the aperture opening to the thickness of the stencil. Check the fine SMTnet Archives for guidelines.
Electronics Forum | Wed Apr 10 22:35:59 EDT 2002 | davef
How do you assure you "have squeegee pressure and speed controlled"? Search the fine SMTnet Archives for background on measuring paste thickness.
Electronics Forum | Thu Apr 03 18:10:08 EST 2003 | Print Master
0402 Adhesive printing is possible with thicker stencils in order to allow mixed component technology. We have successfully printed 0402's with a 0.008" thick SS foil. Total material release is not achievable at this thickness, but not required u
