Career Center | South Plainfield, New Jersey USA | Engineering
Alpha, a business unit of Alent plc and the global leader in the development, manufacturing and sales of innovative specialty materials used in a wide range of industry segments, including electronics assembly, power electronics, die attach, LED ligh
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 | 2015-06-11 21:20:29.0
The use of bottom terminated components (BTC) has become widespread, specifically the use of Quad Flat No-lead (QFN) packages. The small outline and low height of this package type, improved electrical and thermal performance relative to older packaging technology, and low cost make the QFN/BTC attractive for many applications.Over the past 15 years, the implementation of the QFN/BTC package has garnered a great amount of attention due to the assembly and inspection process challenges associated with the package. The difference in solder application parameters between the center pad and the perimeter pads complicates stencil design, and must be given special attention to balance the dissimilar requirements
Industry News | 2010-09-15 21:55:19.0
MARTIN will demonstrate the Prebump/Reball 03.1 unit at the upcoming SMTA Capital Expo and Tech Forum, scheduled to take place Tuesday, September 21, 2010 at the Johns Hopkins University/Applied Physics Lab in Laurel, MD.
Industry News | 2010-10-04 15:37:18.0
MARTIN will demonstrate the Prebump/Reball 03.1 unit at the upcoming Central Texas Electronics Association (SMTA/IMAPS) Expo & Tech Forum, scheduled to take place, October 7, 2010 at the Norris Conference Centers in Austin, TX.
Industry News | 2010-11-18 11:04:08.0
MARTIN will demonstrate the Prebump/Reball 03.1 unit at the upcoming SMTA Arizona-Sonora Expo & Tech Forum, scheduled to take place Wednesday, December 1, 2010 at the Fiesta Inn Resort & Conference Center in Tempe, AZ.
Industry Directory | Consultant / Service Provider / Manufacturer
BEST offers professional rework, repair and prototype builds of PCBs. Our expertise is on BGA rework and QFN rework. Our experienced instructors teach professional soldering classes as we are an IPC certified training center
Industry News | 2021-06-11 03:10:46.0
More and more customers switch their SMT BGA QFN soldering quality from X-ray sampling check to 100% fully inline inspection to guarantee its products quality, previously only in automotive, medical, military and aerospace industries, nowadays also applied into high-end consumer electronics PCBA assembly.
Industry Directory | Manufacturer
PDR manufactures IR BGA rework stations, BGA rework equipment, and SMD rework stations. SMD soldering solutions for BGA Rework, CSP Rework, QFN Rework, LED Rework, 0201 Rework and more. Also offers thermal test equipment. est.1987
Technical Library | 2019-08-07 22:56:45.0
The requirement to reconsider traditional soldering methods is becoming more relevant as the demand for bottom terminated components (QFN/BTC) increases. Thermal pads under said components are designed to enhance the thermal and electrical performance of the component and ultimately allow the component to run more efficiently. Additionally, low voiding is important in decreasing the current path of the circuit to maximize high speed and RF performances. The demand to develop smaller, more reliable, packages has seen voiding requirements decrease below 15 percent and in some instances, below 10 percent.Earlier work has demonstrated the use of micro-fluxed solder preforms as a mechanism to reduce voiding. The current work builds upon these results to focus on developing an engineered approach to void reduction in leadless components (QFN) through increasing understanding of how processing parameters and a use of custom designed micro-fluxed preforms interact. Leveraging the use of a micro-fluxed solder preform in conjunction with low voiding solder paste, stencil design, and application knowhow are critical factors in determining voiding in QFN packages. The study presented seeks to understand the vectors that can contribute to voiding such as PCB pad finish, reflow profile, reflow atmosphere, via configuration, and ultimately solder design.A collaboration between three companies consisting of solder materials supplier, a power semiconductor supplier, and an electronic assembly manufacturer worked together for an in-depth study into the effectiveness of solder preforms at reducing voiding under some of the most prevalent bottom terminated components packages. The effects of factors such as thermal pad size, finish on PCB, preform types, stencil design, reflow profile and atmosphere, have been evaluated using lead-free SAC305 low voiding solder paste and micro-fluxed preforms. Design and manufacturing rules developed from this work will be discussed.
