Industry Directory | Consultant / Service Provider
Adhesive Flip Chip Technologies, Bumping Services (Pd, NiAu, polymer...), Assembly Services (Prototyping to High Volume)
Technical Library | 2012-10-18 21:58:51.0
First published in the 2012 IPC APEX EXPO technical conference proceedings. In this paper, we report on a comprehensive study regarding the morphology evolution and voiding of SnAgCu solder joints on the central pad of two different packages – QFN and an Agilent package called TOPS – on PCBs with a Ni/Au surface finish.
Technical Library | 2017-02-28 12:39:50.0
During the last 5 years mobile phones and other portable consumer electronics have been extremely popular and spread all over the world in different climate zones in very high volumes. At the same time the mobile phone terminal for many people has become a necessity that is brought with them in any activity they practice. These changes in user behavior have heavily changed the impact on handheld terminals from moisture, sweat, corrosive atmospheres and mechanical drop. As a result of this the requirement to solder joint reliability, corrosion stability and wear resistance are heavily increasing to keep a high reliability of the terminal.Immersion Ni/Au has been the overall dominant surface finish on Printed Wiring Boards (PWB's) for the last 10 years, but a paradigm shift to avoid use of this thin and porous surface finish is ongoing nowadays because it can’t address these challenges in a satisfactory way.In today's handheld terminals, Organic Solder Preservative (OSP) has replaced Immersion Ni/Au on solder pads. Carbon surface finish for Key- and spring contact-pads, combined with the right concept design can make use of Immersion Ni/Au unnecessary in the near future. The result will be higher reliability with less expensive and simpler processes.This paper will discuss the various considerations for choice of surface finish and results from the feasibility studies performed.
Industry Directory | Consultant / Service Provider / Manufacturer
Pandawill Circuits manufacture and supply a wide range of high quality PCB technologies, volumes, cost and manufacturing lead-time options based on our fundamental understanding of the PCB manufacture
Industry News | 2003-06-13 10:10:58.0
By combining PacTech's electroless under bump metallization (UBM) processing with DEK's advanced mass imaging systems to create the solder bumps, users can implement a wafer-level, SMT-compatible flip chip assembly process.
Technical Library | 2013-08-29 19:52:43.0
Au over Ni on Cu is a widely used printed circuit board (PCB) surface finish, under bump metallization (UBM), and component lead metallization. It is generally accepted that less than 3 wt.% Au in Sn-Pb solder joints inhibits formation of detrimental intermetallic compounds (IMC). However, the critical limit for Au content in Pb-free solder joints is not well established. Three surface-mount package platforms, one with a matte Sn surface finish and the others with Ni/Au finish, were soldered to Ni/Au-finished PCB using Sn-3.0Ag 0.5Cu (SAC305) solder, in a realistic manufacturing setting. The assembled boards were divided into three groups: one without any thermal treatment, one subjected to isothermal aging at 125°C for 30 days, and the third group aged at 125°C for 56 days...
Industry News | 2010-11-02 10:42:48.0
Christopher Associates today announced the US introduction of Koki’s S3X48-M500 and S3X48-M500C Printable No-Clean Lead-Free Solder Pastes. Originally designed and formulated for superior head-in-pillow performance, the pastes also exhibit exceptional wetting and printing.
Industry News | 2014-02-03 14:13:04.0
FCT Assembly is pleased to announce that it now offers a variety of anti-tombstoning solder pastes as an option with each of its solder paste fluxes.
Industry News | 2016-05-16 20:13:12.0
NEO Tech announces that it will showcase its high-reliability substrate and microelectronic assembly capabilities in booth 2143 at the 2016 IEEE International Microwave Symposium IMS 2016, which is schedule to take place from May 24-26 at the Moscone Center in San Francisco.
Industry News | 2010-03-22 13:14:36.0
GREELEY, CO — FCT Assembly introduces its NL930PT no-clean, lead-free, halide-free pin probable solder paste. The product is unique in that it is a clear residue paste that can print down to low surface area ratios consistently. Combined with SN100C, this solder paste produces the most cosmetically appealing solder joint available on the market.
