Industry Directory | Distributor / Manufacturer / Marketing Agency
D&S(CHINA)CO.,LTD. is a comprehensive group company which includes many subsidiary factories such as garment factory, shoe factory,craft & gift factory,toy factory and others.
New Equipment | Education/Training
Failure Analysis Techniques for Electronics provides an overview of the characterization methods available at ACI Technologies, Inc. for determining the causes of failure in electronics devices. This publication will assist the reader in making inf
PillowStat ESD, CCI's new concept in component packaging includes (2) 1/4" conductive foam 'pillow pads' inside a static shielding injection molded plastic box. This package is designed to safely package one or more ESd sensitive devices without cust
Electronics Forum | Tue Nov 14 13:28:16 EST 2006 | realchunks
I've heard of bitting pillows AND heard of this phenomenon.
Electronics Forum | Mon Feb 23 13:25:21 EST 1998 | Steve Gregory
Steve - you must not work to IPC class 2 or 3 requirements. If the solder is "pillowed" around the lead, I would strongly suspect a wetting problem. Most of the Paladium leads I see soldered have a strong line of demarcation but no pillowing. Hav
Industry News | 2011-08-17 12:59:10.0
The SMTA announced that SMTA International will provide updated research on Head-in-Pillow component soldering defects as well as a focused tutorial on the subject. SMTAI will take place October 16-20, 2011 in Ft. Worth, Texas.
Industry News | 2010-01-22 21:46:55.0
Minneapolis, MN - The SMTA is pleased to announce several new online presentations coming up in February. In response to industry-wide budget cuts and travel restrictions, SMTA has committed to increasing its online programming to better accommodate member needs for technical exchange.
Parts & Supplies | SMD Placement Machines
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Parts & Supplies | SMD Placement Machines
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Technical Library | 2019-05-24 09:22:59.0
There is a smaller process window and a much narrower margin of error when creating and using lead-free reflow profiles for surface mount parts on printed circuit boards (PCBs). Solder balls, dewetting, tombstones, voids, and head-on-pillow problems will occur much more frequently because lead-free alloys behave differently than eutectic pastes. Problems are compounded due to the extra heat necessary for some lead-free pastes to reach their melting points.
Technical Library | 2013-12-27 10:39:21.0
The head-in-pillow defect has become a relatively common failure mode in the industry since the implementation of Pb-free technologies, generating much concern. A head-in-pillow defect is the incomplete wetting of the entire solder joint of a Ball-Grid Array (BGA), Chip-Scale Package (CSP), or even a Package-On-Package (PoP) and is characterized as a process anomaly, where the solder paste and BGA ball both reflow but do not coalesce. When looking at a cross-section, it actually looks like a head has pressed into a soft pillow. There are two main sources of head-in-pillow defects: poor wetting and PWB or package warpage. Poor wetting can result from a variety of sources, such as solder ball oxidation, an inappropriate thermal reflow profile or poor fluxing action. This paper addresses the three sources or contributing issues (supply, process & material) of the head-in-pillow defects. It will thoroughly review these three issues and how they relate to result in head-in pillow defects. In addition, a head-in-pillow elimination plan will be presented with real life examples will be to illustrate these head-in-pillow solutions.
ACI Technologies Inc. (ACI) is a scientific research corporation dedicated to the advancement of electronics manufacturing processes and materials for The Department of Defense and industry. This video provides an overview of our commercial service
Welcome to this Defect of the Month video on head in and on pillow, this series of videos were produced for and featured as part of the NPL/IPC video library and examples are taken from the NPL Defect Database. Over the last couple of years there hav
Events Calendar | Thu Oct 03 00:00:00 EDT 2019 - Thu Oct 03 00:00:00 EDT 2019 | ,
IPC Tech Ed Webinar Series: Ball Grid Array (BGA) and Bottom Termination Component (BTC) Design and Assembly Challenges: Reflow Profiling to Achieve Low Defect Rates and Successful Assembly! – Part 2
Events Calendar | Tue Feb 12 00:00:00 EST 2019 - Tue Feb 12 00:00:00 EST 2019 | ,
Webinar: BGA and Area Array Process Defects - Causes & Cures
SMTnet Express, December 27, 2013, Subscribers: 26441, Members: Companies: 13537, Users: 35564 Addressing the Challenge of Head-In-Pillow Defects in Electronics Assembly by Mario Scalzo; Indium Corporation While the electronics manufacturing
SMTnet Express, March 06, 2014, Subscribers: 22524, Members: Companies: 13810, Users: 35835 Investigation and Development of Tin-Lead and Lead-Free Solder Pastes to Reduce the Head-In-Pillow Component Soldering Defect. Jasbir Bath, Roberto Garcia
