Technical Library: oxidation (Page 1 of 3)

Vacuum Reflow Oven: The Best Way to Solder SMD Components

Technical Library | 2023-09-16 06:27:24.0

Vacuum reflow ovens are the best way to solder SMD components. They create a controlled environment that prevents oxidation and improves solder joint quality.

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Influence of Salt Residues on BGA Head on Pillow (Hip)

Technical Library | 2016-05-26 15:07:36.0

The oxide layers are known as wetting inhibitors in component and PCB metallizations. The oxide acts as barrier that prevent the tin diffusion from happening. Besides, in corrosion studies, the role of salt residues -with Cl ion- on some metals is known as being promoters of oxidation or corrosion. On the other hand, most of corrosion studies with tin metallization are focused mainly on the corrosion resistance of tin alloys, but little has been done respecting to the influence of salts on tin metallization wetting. In this paper, a series of experiments was carried over to know the influence of specifically NaCl on BGA wetting given Head in Pillow (HiP) as result.

Continental Corporation

Effect of Surface Oxide on the Melting Behavior of Lead-Free Solder Nanowires and Nanorods

Technical Library | 2013-07-18 12:12:40.0

Lead-free nanosolders have shown promise in nanowire and nanoelectronics assembly. Among various important parameters, melting is the most fundamental property affecting the assembly process. Here we report that the melting behavior of tin and tin/silver nanowires and nanorods can be significantly affected by the surface oxide of nanosolders.

Department of Chemical Engineering, University of Massachusetts

Aluminum Soldering - Product Guide

Technical Library | 2020-07-29 20:12:52.0

Aluminum is a metal that it is hard to solder due to the high surface tension difference between it and molten solder alloy. This occurs because aluminum rapidly forms a tenacious oxide layer whenever it is exposed to oxygen in the air. The oxide layer is responsible for the high surface tension difference between the aluminum and the solder and impedes the solder from spreading evenly on an aluminum surface. There are hundreds of aluminum alloys available in the marketplace; it is important to identify the form of aluminum that is being soldered. Once this is done, an appropriate soldering technique can be chosen for soldering the specific aluminum alloy under consideration. Direct aluminum soldering eliminates using expensive plating techniques to prepare the aluminum surface for soldering.

Superior Flux & Mfg. Co.

Reduced Oxide Soldering Activation (ROSA)

Technical Library | 2007-07-19 15:15:11.0

ROSA is a surface restoration technique that removes hard to reduce species like metal oxides or sulfides. At the time of its development, the focus was on solderability and compliance to environmental regulations. Industry trends and regulatory changes as a result of the Montreal Protocol were the driver for much of the concern over environmental compliance. The result was an increase in the development of no-clean and water soluble fluxes and the removal of halogenated cleaning chemistries.

Electronics Manufacturing Productivity Facility (EMPF)

Effect of Thermal Aging on Solderabilityof ENEPIG Surface Finish Used in Printed Circuit Boards

Technical Library | 2021-12-29 19:52:50.0

Medtronic seeks to quantify the thermal aging limits of electroless Ni-electroless Pd-immersion Au (ENEPIG) surface finishes to determine how aggressive the silicon burn-in process can be without loss of solderability. Silicon burn-in (power testing at elevated temperature) is used to eliminate early field failures, critical for device reliability. Thermal aging due to burn-in or annealing causes Ni and Pd diffusion to and oxidation on the surface. Surface oxides limit wetting of the PbSn solder, affecting electrical connectivity of components soldered afterburn-in. Isothermal aging of two ENEPIG surface finishes was performed at 75°C-150°C for 100 hrs-1500hrs to test the thermal aging limits and identify how loss of solderability occurs.

Purdue University

Key Steps to the Integrated Circuit

Technical Library | 1999-05-06 13:38:45.0

This paper traces the key steps that led to the invention of the integrated circuit (IC). The first part of this paper reviews the steady improvements in the performance and fabrication of single transistors in the decade after the Bell Labs breakthrough work in 1947. It sketches the various developments needed to produce a practical IC. In addition, the more advanced processes such as diffusion, oxide masking, photolithography, and epitaxy, which culminated in the planar process, are summarized.

Alcatel-Lucent

The Quality and Reliability of Intel's Quarter Micron Process

Technical Library | 1999-05-07 08:48:52.0

This paper describes how the quality and reliability of Intel's products are designed, measured, modeled, and maintained. Four main reliability topics: ESD protection, electromigration, gate oxide wearout, and the modeling and management of mechanical stresses are discussed. Based on an analysis of the reliability implications of device scaling, we show how these four topics are of prime importance to component reliability...

Intel Corporation

A Designed Experiment for the Influence of Copper Foils on Impedance, DC Line Resistance and Insertion Loss

Technical Library | 2013-03-28 16:18:22.0

For the last couple of years, the main concerns regarding the electrical performance of blank PCB boards were impedance and ohmic resistance. Just recently, the need to reduce insertion loss came up in discussions with blank board customers (...) The paper describes the test vehicle and the testing methodology and discusses in detail the electrical performance characteristics. The influence of the independent variables on the performance characteristics is presented. Finally the thermal reliability of the boards built applying different copper foils and oxide replacements was investigated.

Multek Inc.

Oxide Thickness and Solderability Methodology to Determine Long Term Storage of BGAs and QFPs

Technical Library | 2014-10-16 16:39:12.0

Key points are: *Long-term storage of BGA & QFP products may be required due to: Fab and assembly factory transfers Product obsolescence requiring customers make lifetime/EOL purchases Providing extended service (10+ years) on vehicles Other program needs * Integrity of EOL products in terms of solderability needs to be verified.

Freescale Semiconductor Inc

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