Christopher Associates Inc.

A pioneering supplier and distributor to the electronics and chemical processing industries.

category: Inspection

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Christopher Associates Inc. has 3 product(s) in the catalog »

Genitec GAM 60 Solder Paste Mixer

category: Solder Materials

Mixes and softens solder paste in original containers. Improves printing consistency, print quali...

Machvision 3D Profiler

category: Software

The 3D Profiler is an automatic machine to measure the dent of the copper filled vias. The system of...

Japan UNIX Desktop Soldering Systems

category: Reflow

Select from Three Standard Types to Suit Work Size and Work Environment: UNIX-412R, UNIX-413R, UNIX...

Christopher Associates Inc. has 1 technical article(s) »

An investigation into low temperature tin-bismuth and tin-bismuth-silver lead-free alloy solder pastes for electronics manufacturing applications

Published:

Jan 24, 2013

Author:

Jasbir Bath, Manabu Itoh, Gordon Clark, Hajime Takahashi, Kyosuke Yokota, Kentaro Asai, Atsushi Irisawa, Kimiaki Mori, David Rund, Roberto Garcia

Abstract:

The electronics industry has mainly adopted the higher melting point Sn3Ag0.5Cu solder alloys for lead-free reflow soldering applications. For applications where temperature sensitive components and boards are used this has created a need to develop low melting point lead-free alloy solder pastes. Tin-bismuth and tin-bismuth-silver containing alloys were used to address the temperature issue with development done on Sn58Bi, Sn57.6Bi0.4Ag, Sn57Bi1Ag lead-free solder alloy pastes. Investigations included paste printing studies, reflow and wetting analysis on different substrates and board surface finishes and head-in-pillow paste performance in addition to paste-in-hole reflow tests. Voiding was also investigated on tin-bismuth and tin-bismuth-silver versus Sn3Ag0.5Cu soldered QFN/MLF/BTC components. Mechanical bond strength testing was also done comparing Sn58Bi, Sn37Pb and Sn3Ag0.5Cu soldered components. The results of the work are reported....

Christopher Associates Inc. has 103 news release(s) »

Christopher Associates to Exhibit the MAGNUS HD TREND at the SMTA Toronto Expo & Tech Forum

Apr 10, 2012 | Christopher Associates Inc. today announced that it will highlight the Tagarno MAGNUS HD TREND at the upcoming SMTA Toronto Expo & Tech Forum,

Christopher Associates to Exhibit the MAGNUS HD TREND at the Del Mar Show

Apr 02, 2012 | Christopher Associates Inc. today announced that it will highlight the Tagarno MAGNUS HD TREND in Booth #346 at the upcoming Del Mar Electronics & Design Show (DMEDS), scheduled to take place May 2-3, 2012 at the Del Mar Fairgrounds in San Diego, CA.

See Christopher Associates’ Award-Winning MAGNUS HD TREND at IMAPS New England

Mar 16, 2012 | Christopher Associates Inc. today announced that it will highlight the Tagarno MAGNUS HD TREND at the upcoming IMAPS NE 39th Symposium & Expo,

Christopher Associates Has the Golden Ticket! Gives “Advertising Grants” at IPC APEX 2012

Mar 13, 2012 | SANTA ANA, CA — March 2012 ― Industry-leading solutions provider Christopher Associates Inc. made quite the splash with both exhibitors and attendees at the IPC APEX EXPO 2012 in San Diego, CA (2/28-3/1).

Christopher Associates Accepts 2012 NPI Award for the MAGNUS HD TREND from Tagarno

Mar 05, 2012 | Christopher Associates has been awarded a 2012 NPI Award in the category of Rework and Repair Tools for its MAGNUS HD TREND from Tagarno.

The MAGNUS HD TREND from Tagarno has rapidly achieved industry acceptance as one of the most useful inspection and manufacturing tools in the industry.

Christopher Associates to Introduce Leading-Edge SPI at the 2012 IPC APEX EXPO

Feb 22, 2012 | Christopher Associates Inc. introduces the S-1 solder paste inspection system from MEK. The S-1 represents the leading edge in solder paste inspection technology.

Christopher Associates to Display High-Magnification Tagarno Magnus HD Trend at Both SMTA Dallas and Houston 2012

Feb 03, 2012 | Christopher Associates announces that its distributor, TLS Technologies, will display the industry favorite Tagarno Magnus HD Trend at two upcoming SMTA shows.

Tagarno MAGNUS HD High Definition Benchtop Inspection System.

Christopher Associates' Jasbir Bath to Moderate Solder Joint Testing and Performance Meeting at IPC APEX 2012

Jan 30, 2012 | Christopher Associates announces that Jasbir Bath, Consulting Engineer with Christopher Associates/Koki Solder, will moderate Session S21, titled “Solder Joint Testing and Performance,” at the upcoming IPC APEX conference and exhibition.

Jasbir Bath, Consulting Engineer for Christopher Associates Inc./Koki Solder.

Christopher Associates' Jasbir Bath to Present on Lead-free Alloys at IPC APEX 2012

Jan 26, 2012 | Christopher Associates announces that Jasbir Bath, Consulting Engineer with Christopher Associates/Koki Solder, will present at the IPC APEX EXPO 2012. The presentation, “Low Temperature Tin-Bismuth and Tin-Bismuth-Silver Lead-free Solder Pastes for Electronics Manufacturing,” will take place during Session S16, titled “Lead-free Alloys,”.