Electronics Forum | Mon Sep 17 05:48:10 EDT 2012 | stivais
Hi Ben, Yes, this could be the reason but have you ever seen solderability issues for (new) boards with LF-HAL surface finish? I have seen this only if there are surface finish quality issues for bare boards (exposed copper etc.). In this case we di
Electronics Forum | Fri May 01 08:15:36 EDT 2009 | davef
Scavenging Methods [Improve Solder Scavenging of Large Area-array Sites, SMT, Laurence Harvilchuck, process research engineer, Unovis Solutions, harvilch@unovis-solutions.com] Two common methods exist for scavenging residual solder on the site for s
Industry News | 2020-01-08 16:51:58.0
The SMTA Capital Chapter is excited to host a Chapter Meeting on February 20th from 5:00 PM to 7:30 PM at PACE Worldwide in Elkridge, MD. Jason Fullerton, MacDermid Alpha Electronic Solutions, will be presenting “Advances in Lead-Free Solder Technologies for High Reliability Applications.”
Industry News | 2021-03-25 15:48:41.0
The SMTA Officer team is excited to provide our members with a new webinar by Dr. Nathan Blattau, R&D Fellow at Ansys, Inc., on "Next Generation Lead Free Solders for High Reliability and SMT Yield improvement in Client Computing Systems." The webinar will be on Tuesday, April 6th at 12:00 PM EST and will discuss the evolution of lead free (Pb-free) solder, from tin-silver-copper (SAC) system with silver content of 3.0 and 4.0 to low SAC solders and the emergence of high reliability Pb-free solder. It will cover the reasons and the driving forces of industries implementing this change.
Technical Library | 2024-07-24 01:04:35.0
Quad Flat No Leads (QFN) package designs receive more and more attention in electronic industry recently. This package offers a number of benefits including (1) small size, such as a near die size footprint, thin profile, and light weight; (2) easy PCB trace routing due to the use of perimeter I/O pads; (3) reduced lead inductance; and (4) good thermal and electrical performance due to the adoption of exposed copper die-pad technology. These features make the QFN an ideal choice for many new applications where size, weight, electrical, and thermal properties are important. However, adoption of QFN often runs into voiding issue at SMT assembly. Upon reflow, outgassing of solder paste flux at the large thermal pad has difficulty escaping and inevitably results in voiding. It is well known that the presence of voids will affect the mechanical properties of joints and deteriorate the strength, ductility, creep, and fatigue life. In addition, voids could also produce spot overheating, lessening the reliability of the joints.
SMTnet Express, March 17, 2022, Subscribers: 25,805, Companies: 11,547, Users: 27,113 Creep Corrosion On Lead-Free Printed Circuit Boards In High Sulfur Environments The material and process changes required to eliminate lead from
Heller Industries Inc. | https://hellerindustries.com/intermetallics-growth/
Intermetallic Growth on PCB - Heller Home » Intermetallic Growth on PCB Re-printed in partnership with ITM Intermetallic Growth on PCB Where the tin-lead solder adheres to the copper of the lead (from plating) and to the pad
| https://www.eptac.com/blog/leaded-vs-lead-free-solder-which-is-better
. Although, it is important to note that the amount of lead on solders is too insignificant to cause severe health problems. That being said, there is still a risk for workers to be exposed to lead during soldering
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