Electronics Manufacturing Technical Articles

Process Control of Ionic Contamination Achieving 6-Sigma Criteria in The Assembly of Electronic Circuits

Nov 29, 2018 | P. Eckold, M. Routley, L. Henneken, G. Naisbitt, R. Fritsch, U. Welzel

Ionic contamination testing as a process control tool a newly developed testing protocol based on IPC-TM 650 2.3.25, was established to enable monitoring of ionic contamination within series production. The testing procedure was successfully implemented within the production of high reliability, safety critical electronic circuits, involving multiple production sites around the world. I will be shown in this paper that the test protocol is capable for meeting Six-Sigma-Criteria....

Publisher: Robert Bosch LLC Automotive Electronics Division

How to choose a reliable CF Card for VDR

Nov 22, 2018 | Miya

VDR (Voyage Data Recorder) is an instrument continuously recording real-time data of ship body, including speech communication signal of cockpit, sensors data, alarm status and radar images, etc.. So what's types of storage devices may meet VDR's requirement?...

Publisher: Renice Technology Co., Ltd

Understanding the Effect of Different Heating Cycles on Post-Soldering Flux Residues and the Impact on Electrical Performance

Nov 20, 2018 | Brook Sandy-Smith, Indium Corporation and Terry Munson, Foresite Inc.

There are several industry-accepted methods for determining the reliability of flux residues after assembly. The recommended methods of test sample preparation do not always closely mimic the thermal cycle experienced by an assembly. Therefore, extraction from actual assemblies has become a popular method of process control to assess consistency of post-reflow cleanliness. Every method of post-reflow flux residue characterization will depend on the reflow process followed to prepare the coupon.

This investigation will focus on the effect of thermal conditions on the remainder of active ingredients in flux residues after assembly with no-clean solder pastes....

Publisher: Indium Corporation

Status and Outlooks of Flip Chip Technology

Nov 14, 2018 | John H. Lau

Status of flip chip technology such as wafer bumping, package substrate, flip chip assembly, and underfill will be reviewed in this study. Emphasis is placed on the latest developments of these areas in the past few years. Their future trends will also be recommended. Finally, the competition on flip chip technology will be briefly mentioned....

Publisher: ASM Pacific Technology

Laser-Based Methodology for the Application of Glass as a Dielectric and Cu Pattern Carrier for Printed Circuit Boards

Nov 07, 2018 | Joel Schrauben, Cameron Tribe, Christopher Ryder and Jan Kleinert

Glass offers a number of advantages as a dielectric material, such as a low coefficient of thermal expansion (CTE), high dimensional stability, high thermal conductivity and suitable dielectric constant. These properties make glass an ideal candidate for, among other things, package substrate and high-frequency PCB applications.

We report here a novel process for the production of printed circuit boards and integrated circuit packaging using glass as both a dielectric medium and a platform for wiring simultaneously....

Publisher: Electro Scientific Industries

Possible reasons for simultaneous solder skip and short circuit of BGA

Nov 07, 2018 | Rita Li --Seamark Zhuomao technology

Generally speaking, there are not many cases of insufficient solder and solder short in BGA soldering, but it is not impossible. Here we discuss some elements may cause it...

Publisher: Seamark Zhuomao Photoeletric technology(Shenzhen)CO., ltd

Study of the Rheological Behaviors of Solder Pastes

Nov 06, 2018 | Michal KRAVČÍK, Igor VEHEC

Solder paste is a homogeneous, stable suspension of solder powder particles suspended in a flux binder, and is one of the most important process materials today in surface mount technology (SMT). By varying the solder particle size, distribution and shape, as well as the other constituent materials, the rheology and printing performance of solder pastes can be controlled. Paste flow behavior is very important in defining the printing performance of any paste.

The purpose of this paper is to study the rheological behavior of SAC (Sn-Ag-Cu) solder paste used for surface mount applications in the electronic industry. The reason why the rheological tests are presented in this paper are two critical sub-processes: aperture filling and paste withdraw. In this paper, we report on the investigation of the rheological profiles, the serrated cone-to-plate system was found as effective in parameter minimizing the wall-slip effect...

Publisher: Technical University of Košice

High Throw DC Acid Copper Formulation for Vertical Continuous Electroplating Processes

Oct 31, 2018 | Saminda Dharmarathna, PhD, Ivan Li, PhD, Maddux Sy, Eileen Zeng, Bob Wei, William Bowerman, Kesheng Feng, PhD

The electronics industry has grown immensely over the last few decades owing to the rapid growth of consumer electronics in the modern world. New formulations are essential to fit the needs of manufacturing printed circuit boards and semiconductors. Copper electrolytes for high throwing power applications with high thermal reliability and high throughput are becoming extremely important for manufacturing high aspect ratio circuit boards.

Here we discuss innovative DC copper metallization formulations for hoist lines and VCP (Vertical Continues Plating) applications with high thermal reliability and throughput for high aspect ratio PCB manufacturing...

Publisher: MacDermid Inc.

QPlan - NPI Tools included

Oct 29, 2018 | Alexei Shkolnik from Proventus Technologies

We found that NPI process of SMT is mostly similar and sometimes overlapping to tooling process. In addition, in most cases the programmer is part of the team working on the NPI process. So, QPlan was extended with NPI Tools as a part of tooling process. This allows the team to carry out the NPI process at offline. And at the end of it, they can create corrected SMT program at zero time....

Publisher: Proventus Technologies

Rosin Resins Solution for Soldering Industry

Oct 26, 2018 | Jack Su

A product whitepaper of modified resins for soldering industry....

Publisher: Foreverest Resources Ltd.