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SMTnet Express June 6, 2013, Subscribers: 26122, Members: Companies: 13388, Users: 34775

Technical Library

Best Practices Reflow Profiling for Lead-Free SMT Assembly

by: d Briggs and Ronald C. Lasky, Ph.D., PE; Indium Corporation of America

The combination of higher lead-free process temperatures, smaller print deposits, and temperature restraints on electrical components has created difficult challenges in optimizing the reflow process. Not only are the electronic components and the PWB at risk, but the ability to achieve a robust solder joint becomes difficult, especially if the PCB is thermally massive. In addition, the constant miniaturization of electronic components, hence smaller solder paste deposits, may require the use of smaller particle-sized powders (...)

This paper is a summary of best practices in optimizing the reflow process to meet these challenges of higher reflow temperatures, smaller print deposits, decreased powder particle size, and their affect on the reflow process...

First published in the SMTA China (Shanghai) 2009 technical conference proceedings

read article »

Forum search results for related keywords: solder defects, reflow profile, tombstone, solder beads, solder balls, voids, head-in-pillow, graping

SMT / PCB Products

S-922N Series Dual-Lane Dispenser
S-922N Series Dual-Lane Dispenser

Ideal for flip chip and CSP underfill...

by: Asymtek

VIGON® N 600
PCB Defluxing Agent
VIGON N 600 Cleaning and Defluxing Agent

Water-based and biodegradable...


BGA Rework Station
FINEPLACER´┐Ż coreplus BGA rework station

The perfect blend of performance and cost...

by: Finetech

BGA Solder
BGA Solder Spheres

Exceed both the IPC and MIL standards...


iico Pick & Place System (new!)
iico Pick & Place System

For the latest electronic production needs...

by: Europlacer

Stencil Printer
SP700avi Inline Stencil Printer

Utilising the most advanced drive...

by: Speedprint

SM471 Flexible High
Speed Chip Shooter
SM471 Flexible High Speed Chip Shooter

Chip mounting speed of 75,000 CPH...


Mark5 Series -
Reflow System
The Mark III Reflow System

Up to 40% reduction in nitrogen consumption...

by: Heller

SMT / PCB Equipment Auctions

X-Line - SMT Equipment Auctions

Jabil -Auction # 40 - Surplus SMT Equipment

June 12-13 | auction by: X-Line Asset Management

Electronic Equipment Mart

Speedline MPM UP
Screen Printer
Speedline MPM UP 2000/B Screen Printer

IBE SMT Equipment

all marketplace listings

Crown Simplimatic
Reflow Exit Conveyor
Crown Simplimatic Reflow Exit Conveyor


all marketplace listings

YesTech YTV-2050
YesTech YTV-2050 AOI

JMW Enterprises

all marketplace listings

Pillarhouse Topaz E-300
Wave Solder...
Pillarhouse Topaz E-300 Wave Solder


all marketplace listings

Events Calendar

Counterfeit Electronics Symposium East
June 25

Printed Electronics Asia 2013
July 9 - 10

Career Center


Field Service Engineer

Santa Ana, CA, UK | CGI Americas

Technical Sales Engineer

San Diego, CA, USA | YINCAE Advanced Materials, LLC.

Senior SMT Printing Applications - Sales Engineer

Franklin, MA, USA | Speedline Technologies


SMT Engineer

Melbourne, FL, USA

Security Systems Engineer

Trivandrum, India

Accounting & Payroll Administrator

Surrey, BC, Canada

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: PoP Applications, Requirements, Infrastructure and Technologies - July 16


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: Technical Conference: Innovations in Electronics Manufacturing for Medical Devices - June 4 - 5

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Capital Equipment Exchange - Used PCB Assembly Equipment

Software for PCB Manufacturing - Unisoft

Custom SMT Equipment Nozzles - Count on Tools

Momentum Series Stencil Printers - Speedline

PCB Equipment Auctions - X-Line

Mark5 SMT Reflow Oven - Heller

SMT Equipment Exchange Auction

SP700avi Inline Stencil Printer - Speedprint

ii-Feed tape feeding solution for Europlacer machines

Zestron - cleaning products for the SMT industry

SMTnet - Electronic Industry Hub

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Jetting Pump for Integration

Voidless Reflow Soldering