Demands for Producing IPC Class 3! Lars-Olof Wallin IPC European Representative Seminar MITT University 2014-11-27.

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Presentation transcript:

Demands for Producing IPC Class 3! Lars-Olof Wallin IPC European Representative Seminar MITT University

IPC Part: 7 Introduction to Produce acc to IPC Class 3 How extensive is it to write a specification?

What expectations do you have of this workshop? The answer is? You hope to find some Gold!

I can convert Lead into GOLD!!

Which IPC Standards does is most known? IPC-A-610E?

Is it OK according to IPC-610E Class 3?

IPC-A-610E

It is not OK!!

The board didn't work!

Will this book solve the problems? NO!! Rev E

Questions?? Please answer the following questions: Do you have demands for IPC Class 3 today? Have you some problems with the solder joint results and or your bare boards?

Why do you have PROBLEMS? The Answer is: Lot of parameters during the entire production chain!

Number of Combinations Too Many!!

PWB COMPONENTS STENCIL PASTE Digital Data

Let us take some examples!

Offset resist window opening up track and possibly touching BGA pad

Inner layer Solder filled via hole Copper wall Crack Implications of CTE in the Z-direction Greater tendency for cracks betwee inner layer and the wall for wider holes. Greater tendency for barrel crack in thinner via holes (larger aspect ratio)

What can GO WRONG?

The Electronic Designer I like complicated functions on a small surface!! Is the Electronic Design the ROOT CAUSE?

The CAD People What is IPC-7351B? My footprints hasn't changed since 1903! Is the CAD the ROOT CAUSE?

Is PCB OK? Is the Bare Board the ROOT CAUSE?

What do you see here? How many PTH do you have in your PCB?

PWB COMPONENTS STENCIL PASTE Digital Data

Loading CAM Screen print Jet printer Is the Screen printing the ROOT CAUSE?

Pick & Place Is the Pick & Place the ROOT CAUSE?

Pick & Place Repair of BGA X-Ray Vapor Phase Reflow AOI Unload Is the Reflow or Wave Soldering the ROOT CAUSE?

Reflow AOIUnload Wave Soldering Cleaning Manual Assa

It is many Process Steps! The cause of a bad Solder Joint can be hard to find!

It is NOT a piece of cake!

What shall You Do Now? No Control – Just Deliver? Deliver and hope for the Best? Start to Repair and Lose €€€?

What can it COST?

A typical Bare board You are assembling in quantities of: 1000? Costs: - Bare Board: 3€ each? - Components (BOM): 15€/board? - Assembling, Soldering & Testing: 4€/PCB? Total: 1000 x ( ) = € 18%

IPC-A-610E

It is not OK!!

SUMMARY What shall You do? COST IPC Class 3 GO WRONG