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Virtual Access Technique Augments Test Coverage on Limited Access PCB Assemblies

SMTnet Express May 3, 2012, Subscribers: 25098, Members: Companies: 8863, Users: 33057

Technical Library

Virtual Access Technique Augments Test Coverage on Limited Access PCB Assemblies

First published in the 2012 IPC APEX EXPO technical conference proceedings

by: Anthony J. Suto, Teradyne Inc.

Increased pressures to reduce time to market and time to volume have forced many manufacturers of populated printed circuit boards to rely on capacitively coupled, un-powered, vectorless in-circuit test techniques to identify open pins on ICs and connectors. Unfortunately, faster signals and higher-density printed circuit boards (PCBs) have placed pressures on designers to reduce the number of test pads that provide electrical access for vectorless test techniques.

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Electronics Forum

BGA Alignment - We use a small surface mount connector that has two alignment pins to ensure proper alignment...

Oven Shutdown Temperature - We power down our reflow oven over the weekend, but before that we let the heating zones...

Tin Mitigation Processes - I have heard there is a process for mitigating the pure tin issues for 0402/0201 size parts...

SMT / PCB Products

Defluxing Agent
HYDRON WS 325 - FAST Technology based cleaning agent

Remove water-soluble (OA) flux residues from electronic assemblies...

Offered by: ZESTRON

MV 7 Series
In-Line AOI Machine
MV 7 Series AOI

Superior Defect Detection / Lowest False Call Rate...

Offered by: Mirtec Get Your Power Membership

CELLS - MES & Tracking
Unisoft CELLS MES & Tracking Software

Total traceability in manufacturing floor operations...          Download Trial

Offered by: Unisoft Get Your Power Membership

SP880avi 29"
Inline Stencil Printer
SP880avi 29 inline stencil printer

With unique 'paste on stencil' inspection feature...

Offered by: Speedprint

iineo II
Pick & Place System
iineo II Pick & Place

Extremely high feeder count, largest industry board size...

Offered by: Europlacer

SMT Nozzles
and Consumables
Micro Nozzle

High quality replacement parts for PCB Assembly Equipment...

Offered by: Count On Tools

SMT / PCB Equipment Auctions

SMT and Test Facility Auction due to Outsourcing of Manufacturing

May 15 | Online Auction

auction by: X-Line Asset Management

X-Line Electronic Equipment Auctions

Electronic Equipment Mart

Hitachi GXH-1S
Chip Mounter
Hitachi GXH-1S Chip Mounter

Fortunetech Inc.

all marketplace listings

Speedline Xyflex Pro
Adhesive Dispenser
Speedline Xyflex Pro Adhesive Dispenser

CE Exchange

all marketplace listings

Quad MV-100
Screen Printer
Quad MV-100 Screen Printer


all marketplace listings

Electrovert Omniflo 10
Reflow Oven
Electrovert Omniflo 10 Reflow Oven

JMW Enterprises

all marketplace listings

Events Calendar

International Conference on Soldering & Reliability (ICSR)

Conference | May 15-18 | Toronto, Ontario, Canada | Sponsored by: SMTA

From design ideas, to custom and stock parts, thru final assembly...

High Temperature Electronics (HiTEC 2012)

Trade Show/Exhibition | May 8-10 | Albuquerque, NM, USA | Sponsored by: IMAPS

Place to meet high-quality, reliable American job shops and contract manufacturers...

SMT Hybrid Packaging 2012

Conference, Trade Show/Exhibition | May 8-10 | Nuremberg, Germany | Sponsored by: Mesago Messe Frankfurt GmbH

Europe's leading event for System Integration in Micro Electronics...

Career Center


Hand Solder-pcb assembler

Springfield, VA, USA | Cornet Technology

Soldering Support

Kenosha WI, USA | PROMATION, Inc

Manufacturing Mananger

Northford, CT, USA | Honeywell


SMT Machine S/W Architect

Seongnam, Kyonggy, South Korea

SMT Technician

Imus Cavite, PH, Philippines

SMT equipment eng

Seoul, South Korea

Industry Associations Events


SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore

Next Event: Webinar: Troubleshooting the Stencil Printing Process - May 7


IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly. Membership Info | Training & Certification Programs | Standards & Publications - Online Store

Next Event: Webinar - Is Cleaning Critical to PoP Assemblies? - May 8

Technical Editor - David Fish, Newsletter Editor - Anna Girouard, listings(at), 1-207-780-0887, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Capital Equipment Exchange - Used PCB Assembly Equipment

Expert 10.6 Rework Station  - Hybrid or IR and convection

PPM - Pre-Owned Quad, MPM Equipment

Hydron WS 325 - FAST Technology OA Defluxing

IBE - Used SMT Equipment

SP700avi inline stencil printer

PCB Equipment Auctions

Soldering Tools

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