Electronics Forum: corrosion on via hole pcb (19)

Re: 2 questions: via tenting and annular ring terminology.

Electronics Forum | Wed Jul 07 09:47:41 EDT 1999 | Peter Brant

| | Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. WIth regards to this question, and scott's follow up, I have used the "epoxy me

Tented vias on ENIG boards

Electronics Forum | Wed Feb 01 18:11:43 EST 2006 | Chris

I wonder if they are concerned about getting chemicals trapped in the tented vias. If the tented vias have pin hole openings or even larger openings, chemicals from the ENIG process could become entrapped in the via holes and not washed away in the

Industry News: corrosion on via hole pcb (12)

GPD Global to Focus on PCD Dispensing at ATX West 2011

Industry News | 2011-01-12 17:48:44.0

GPD Global will highlight its Positive Cavity Displacement (PCD) Dispensing in Booth #6111 at the upcoming Automation and Technology West Expo (ATX), scheduled to take place February 8-10, 2011 at the Anaheim Convention Center in Anaheim, CA.

GPD Global

GPD Global's PCD Dispensing on Its MAX Series Platform Recognized with Two 2011 Global Technology Awards

Industry News | 2011-11-20 13:36:13.0

GPD Global has been awarded two Global Technology Awards in the categories of Adhesives/Coatings/Encapsulants and Dispensing Equipment for its PCD Dispensing on the MAX Series Platform

GPD Global

Technical Library: corrosion on via hole pcb (1)

PCB Fabrication Processes and Their Effects on Fine Copper Barrel Cracks

Technical Library | 2015-12-23 16:57:27.0

The onset of copper barrel cracks is typically induced by the presence of manufacturing defects. In the absence of discernible manufacturing defects, the causes of copper barrel cracks in printed circuit board (PCB) plated through holes is not well understood. Accordingly, there is a need to determine what affects the onset of barrel cracks and then control those causes to mitigate their initiation.The objective of this research is to conduct a design of experiment (DOE) to determine if there is a relationship between PCB fabrication processes and the prevalence of fine barrel cracks. The test vehicle used will be a 16-layer epoxy-based PCB that has two different sized plated through holes as well as buried vias.

Raytheon

Express Newsletter: corrosion on via hole pcb (938)

SMTnet Express - May 10, 2018

SMTnet Express, May 10, 2018, Subscribers: 31,023, Companies: 10,930, Users: 24,698 Relative Humidity Dependence of Creep Corrosion on Organic-Acid Flux Soldered Printed Circuit Boards Haley Fu, iNEMI Creep corrosion on printed circuit boards

SMTnet Express - November 10, 2016

SMTnet Express, November 10, 2016, Subscribers: 26,5620, Companies: 15,019, Users: 41,389 Corrosion Resistant Servers for Free-Air Cooling Data Centers Qiujiang Liu; Baidu, Inc., Prabjit Singh; IBM Corporation This paper describes a corrosion

Partner Websites: corrosion on via hole pcb (485)

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