New Equipment | Board Handling - Pallets,Carriers,Fixtures
MB Manufacturing’s Glass Inspection Insert is a heat, shock and chemically resistant borosilicate glass containing 80% silica and 13% boric oxide. It expands very little when heated, so it can withstand great temperature changes without cracking. Th
Electronics Forum | Thu Feb 14 17:40:34 EST 2013 | jorge_quijano
PCB Supplier made an EDX anaysis, the found a chemical trapped in the holes, and some burnt burrs, according to what they say this stains are over the solder mask & silk, so they do not affect functionality.
Electronics Forum | Mon Jul 01 15:37:56 EDT 2002 | pjc
Possible cause can be design related- if the solder land is too small. Check w/ IPC SM-782 Solder Land Design Guide Another is board finish. I have seen problems like this with Gold finished PWBs- which creates a more brittle solder joint.Another pos
Industry News | 2018-10-18 08:34:52.0
How to Prevent Solder Bridging in 3528 PLCC6 RGB LEDs?
Industry News | 2018-12-08 03:27:35.0
Printed Circuit Board (PCB) for Surface Mount Technology (SMT)
Technical Library | 2013-01-17 15:37:21.0
A problem exists with electroless nickel / immersion gold (ENIG) surface finish on some pads, on some boards, that causes the solder joint to separate from the nickel surface, causing an open. The solder has wet and dissolved the gold. A weak tin to nickel intermetallic bond initially occurs, but the intermetallic bond cracks and separates when put under stress. Since the electroless nickel / immersion gold finish performs satisfactory in most applications, there had to be some area within the current chemistry process window that was satisfactory. The problem has been described as a 'BGA Black Pad Problem' or by HP as an 'Interfacial Fracture of BGA Packages…'[1]. A 24 variable experiment using three different chemistries was conducted during the ITRI (Interconnect Technology Research Institute) ENIG Project, Round 1, to investigate what process parameters of the chemical matrix were potentially satisfactory to use and which process parameters of the chemical matrix need to be avoided. The ITRI ENIG Project has completed Round 1 of testing and is now in the process of Round 2 TV (Test Vehicle) build.
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FREE Webinar: Eliminate Circuit Board Problems and Failure Modes
SMT Express, Volume 5, Issue No. 8 - from SMTnet.com Equipment Impacts of Lead Free Wave Soldering The popular tin (Sn) rich lead free solders are causing severe corrosion to many of the materials used in today�s Wave Solder systems
SMTnet Express, December 23, 2015, Subscribers: 23,927, Members: Companies: 14,845, Users: 39,621 PCB Fabrication Processes and Their Effects on Fine Copper Barrel Cracks Edward Arthur, Charles Busa, Melissa Durfee, Chad Gibson, Wade Goldman P
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/resource-center/solder-glossary-of-terms
. Low Temperature Alloy Refers to a solder alloy with a liquidus temperature below 183° C (361° F). See Liquidus . M Manhattan Effect See Tombstoning . Mask (Solder Mask
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/00600-248.pdf
— What Really Causes ‘Tombstoning’? Tombstoning, or the displacement of a chip component during reflow into a near verti- cal position with only one terminal soldered, is caused by accelerated heating
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