Here are the workshops I will be conducting at Nepcon West in the USA if any one
feels that a trip to the sun is of benefit. 

This will be my 8th year at Nepcon West it will be time for my Gold Watch soon I
also love the sun we get so little in the UK.


Wave Soldering Surface Mount Boards with Zero Defects - Half Day 25th Feb

Soldering Materials for SMT - Fluxing for Conventional and Low Solids - Pre Heat
Measurement Solder Waves for SMT - Process Control Testing - Establishing
Process Settings - SMT Soldering Standards - Defect Analysis Clinic


X-Ray Inspection of Fine Pitch and BGA - Half Day 25th Feb

Introduction to x ray inspection - Equipment requirement - Selection criteria -
Inspection standards - BGA - Gull wing - J Lead - Chip terminations - Process
defects - Operator training


Design For Manufacture and Assembly - 24th Feb

Component selection and specification-Fine pitch and Ball Grid Array-PCB
specification-Laminate selection-Track and hole sizes-Pad and stencil
apertures-Pad sizes for conventional and SMT Resist selection for no
clean-Solder finish and cost reduction-Multi panel design-Design reviews Layout
for small and volume production-Process problems and solutions through design


Introduction to Ball Grid Array Design and Assembly - 25th Feb

BGA advantages and disadvantages-BGA suppliers-Design rules-Printed board
layout-Pad and resist footprints-Surface finish selection-Inspection/assembly
marks-Assembly process-Solder paste printing Flux reflow methods-Temperature
profiling-Reflow by convection and vapour phase-Moisture removal Rework
procedures-BGA failures-Package cracking-Missing balls-Solder
balls-Misalignment-Non reflow-Inspection criteria-Production trial results

Further information is available from the Nepcon Home Page.

Bob Willis
Process Engineering Consultant
Electronic Presentation Services
2 Fourth Avenue, Chelmsford, Essex CM1 4HA. England.
Tel: (44) 01245 351502
Fax: (44) 01245 496123
Home Page: http://ourworld.compuserve.com/homepages/Bwillis
Email: [log in to unmask]


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