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Design and Construction Affects on PWB Reliability

SMTnet Express April 26, 2012, Subscribers: 25100, Members: Companies: 8853, Users: 33038

Technical Library

Design and Construction Affects on PWB Reliability

First presented at IPC Apex Expo 2012

by: Paul Reid, PWB Interconnect Solutions

The reliability, as tested by thermal cycling, of printed wire boards (PWB) are established by three variables; copper quality, material robustness and design. The copper quality was most influential and could be evaluated pretty accurately by microsectioning methods to determine the general quality of the board. Next in the hierarchy of influence came the robustness of material, and the tertiary influence was design. With the advent of Removal of Hazardous Substances (RoHS) causing lead to be removed from solder and the increase in thermal excursions for assembly and rework to 260C, materials tend to be as much a problem as copper quality in the robustness of PWBs.

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Electronics Forum

Underscreen cleaning cycles - I was just wondering what everyone is using for a standard cleaning cycle...

SMD Capacitor - I have a project to make 3A Power supply, and i want to make it using SMD...

Local Cleaning Post Rework on PCB with Conformal Coating - Scenario: You have to rework a part (small IC or resistor)...

SMT / PCB Products

EXPERT 10.6
Automated Rework System
EXPERT 10.6 Automated Rework System

A unique rework system that combines IR radiation with convection heating

Offered by: Martin GmbH

FlexSolder S3532
High Speed Stamp Soldering...
FlexSolder S3532 - High Speed Stamp Soldering System

3 Stage pre-heating with Radiant IR and convection...

Offered by: Juki

ProntoPLACE SMT,
Thru-hole Software
Unisoft ProntoPLACE SMT, Thru-hole Software

Any CAD/CAE to any SMT & THT Machine... Download Trial

Offered By: Unisoft

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

Universal Instruments
Precision Pro Feeders
Universal Instruments Precision Pro Feeders

IBE SMT Equipment

all marketplace listings

Speedline Xyflex Pro
Adhesive Dispenser
Speedline Xyflex Pro Adhesive Dispenser

CE Exchange

all marketplace listings

Heller 1700EXL
Reflow Oven
Heller 1700EXL Reflow Oven

PPM

all marketplace listings

Fuji QP 351
Pick and Place
Fuji QP 351 Pick and Place

Cardinal Circuit

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...

Greater Chicago Design-2-Part Show

Trade Show/Exhibition | May 1 | Schaumburg, IL, USA | Sponsored by: Design-2-Part Shows

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

Jobs:

AOI Applications and Support Engineer

Dallas, TX, USA | Vi TECHNOLOGY

Field Service Engineer

Southern CA, USA | Dynatech Technology / Samsung

Manufacturing Mananger

Northford, CT, USA | Honeywell

Resumes:

SMT Machine S/W Architect

Seongnam, Kyonggy, South Korea

SMT Technician

Imus Cavite, PH, Philippines

Sales Engineer Manager

Toshima, Tokyo, Japan

Industry Associations Events

SMTA

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

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)SMTnet.com, 1-207-780-0887

SMTnet.com, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Quality Pre-owned PCBA Equipment

SP700avi inline stencil printer

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Aqueous Technologies Zero-Ion g3

Unisoft Software for SMT Placement

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