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SMTnet Express, December 27, 2013, Subscribers: 26441, Members: Companies: 13537, Users: 35564

Technical Library

Addressing the Challenge of Head-In-Pillow Defects in Electronics Assembly

by Mario Scalzo; Indium Corporation

While the electronics manufacturing industry has been occupied with the challenge of RoHS compliance and with it, Pb-free soldering, established trends of increasing functionality and miniaturization have continued. The increasing use of ultra-fine pitch and area-array devices presents challenges in both printing and flux technology. With the decrease in both the size and the pitch of said components, new problems may arise, such as head-in-pillow and graping defects. Print transfer efficiency of the solder paste must be maximized to maintain consistent solder volumes and acceptable solder joints; process optimization may also be a factor. Flux activators have to be redesigned to allow for the less-than-ideal soldering performance of high-tin alloys. These challenges have been met by a statistical approach to formulating solder paste rheology and flux chemistry resulting in high print efficiencies and appropriate activity release to produce high first-pass yields.

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Forum search results for related keywords: head-in-pillow, reflow, solder sphere, solder joint, warpage.

SMT / PCB Products

The Spectrum™ II
Fluid Dispenser

High speed, high accuracy, scalable...

in: Dispensing

by: Asymtek

MS-11 Series
In-Line AOI Machine

High Speed Precision In-Line SPI System...

in: Inspection

by: Mirtec


Be production ready in minutes not days... Trial

in: Software

by: Unisoft

PCB Cleaning Agent

For cleaning water soluble flux residues...

in: Cleaning


Pick & Place System

For the latest electronic production needs...

in: Pick & Place

by: Europlacer

Inline Screen Printer

Eliminate additional capital outlay...

in: Printing

by: Speedprint

Solder Paste

True multi-process capabilities...

in: Solder Materials


Mark5 Series -
Reflow System
The Mark III Reflow System

Up to 40% reduction in nitrogen consumption...

in: Reflow

by: Heller

SMT / PCB Equipment Auctions

Electronic Manufacturing Equipment Market #180 North America

GoIndustry DoveBid - SMT Equipment Auctions

Jan. 12 - 16
auction by: GoIndustry DoveBid

Featuring: Test and Measurement, SMT Assembly Equipment

Electronic Equipment Mart

Vitronics 6622C
Wave Solder

in: Wave Solder

IBE SMT Equipment

all marketplace listings

Crown Simplimatic Reflow Exit Conveyor

in: Conveyors


all marketplace listings

Mydata MY100DX
Pick and Place

in: Pick and Place


all marketplace listings

DEK Europa
Screen Printer

in: Screen Printing Equipment

CE Exchange

all marketplace listings

Events Calendar


Las Vegas, NV, USA | March 25 - 27 | by: IPC

More than 400 exhibitors showing equipment, materials, services for electronics manufacturing...

DesignCon 2014

Santa Clara, CA, USA | Jan 28 - 31 | by: UBM Canon

The premier educational conference and technology exhibition for electronic design engineers...

Career Center


Production Supervisor

Meridian, ID, USA | Western Electronics

Universal Inst. Surface Mount Technician

Hudson, NH, USA | NEA LLC

Engineers SMT Equipment

Detroit, MI, USA | 4 Tech Electronics Inc.


Electronics Manufacturing - Soldering - SMT and Thru-hole

Princeton, TX, USA

SMT Service Maintenance Technician

Cavite, Philippines

B-Tech with 6+ Years Exp in SMT Industry

Bangalore, India

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: Carolinas Expo & Tech Forum - January 23


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: IPC Designer Certification sessions (CID and CID+) in conjunction with IPC APEX EXPO 2014 - March 21 - 23

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

Electronic Manufacturing Equipment Market #180 � Auction by Goindustry Dovebid

Europe's No. 1 source for pre-owned SMT equipment - AdoptSMT

SolderLab - solder analysis of wave solder machines and solder pots

NextJet Fluid Dispensing - Asymtek

3D SMT AOI - Mirtec

PCB Cleaning products - Zestron

Mark5 SMT Reflow Oven - Heller

Pre-Owned Quad, MPM Equipment - PPM

SP700avi Inline Stencil Printer - Speedprint

IPC Apex Expo 2014

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