Electronics Forum: stackup (Page 1 of 4)

Stack up Analysis

Electronics Forum | Thu Aug 05 11:40:24 EDT 2004 | Dhanish

How do you perform stackup analysis for mechanical parts?I refer to some documents and it is very detail.

Recommended TG material for CCBGA , CBGA and PBGA's

Electronics Forum | Wed Feb 26 21:44:52 EST 2003 | Paul Dansereau

I will be building a board, about 8 X 12 , .062" thick using a standard FR406 stackup. It has a variety of devices, including CCBGA , CBGA and PBGA's. Given the challenge of developing a reflow profile that will accomodate both ceramic and plastic BG

Reflowed Component Placement Tolerance

Electronics Forum | Wed Oct 15 12:32:19 EDT 2003 | Gregg

We are looking at a design that has an smt led emiter and a corresponding smt detector. After reviewing the tolerance stackup, we need a reflowed placement accuracy of +/-0.25mm(+/-0.010") for each component. Any thoughts/opinions?

Stack up Analysis

Electronics Forum | Thu Aug 05 17:21:48 EDT 2004 | russ

A stackup is basically this, if all parts (mating) are at the high end or low end of tolerances will they still fit together or meet any dimensional requirements as an assembly.

Delamination / Measling

Electronics Forum | Mon Dec 08 17:06:59 EST 2008 | boardhouse

Hi MGL, Couple things to ask, have the boards recently been changed to Rohs builds? STD FR4 to High TD Laminate. Check the stack-up the board houses are using. Just about all Rohs laminate has Resin starvation issues when used in single ply co

SOLDER SHORT DUE TO VOID IN BGA

Electronics Forum | Thu Jun 18 12:43:45 EDT 2020 | emeto

I would say you check FAB drawing and see if there is any strange value on the stackup. Usually board house should inform you of these.

IPC-TM-650

Electronics Forum | Wed Jan 29 14:22:56 EST 2003 | russ

Most bowing I see is caused by an asymetrical layer stackup of the PCB. (different copper thicknesses throughout the stackup) e.g. for a 4 layer board - 2 oz. copper on layer 1, 1 oz. copper on layer 4, etc... I would doubt that is the V-score since

Design Guides

Electronics Forum | Wed Jul 22 09:58:02 EDT 1998 | LeeAnne

I'm trying to put together a set of design guides for use for new designers in house or to be sent out for contracted layout work. I would like to start with a top ten list of things that will go wrong if rules aren't available. For example testpoint

PC Board Guidelines

Electronics Forum | Thu Sep 20 15:05:20 EDT 2007 | jax

You can specify the prepreg thickness in the stackup. Once you have specified it somewhere, make your PCB manufacturer build to it... and prove it through cross-section analysis. Depending on the Board cost, we require a cross-section and analysis d

Would YOU accept this PCB ???

Electronics Forum | Wed Aug 20 08:16:10 EDT 2008 | grics

Chunks... You are pretty damn awesome! Anyways, in regards to the original thread, we do get good boards from china as well, but we have had issues with stack-up tolerances and even mouse bite (drilled break away) tabs. Not to long ago, we left t

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