600V *RO4350B *RO4003C Dielectric material & Stack up requirement FR-4(no copper): 0.05-3.2mm for option Prepreg type: 7628H(7630), 7628(43%), 7628(41%), 2116HR, 2116, 2113, 1080 and 1060 for option Copper
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.
Technical Library | 2013-01-17 15:34:33.0
The use of an electroless nickel, immersion gold (ENIG) surface finish comes with the inherent potential risk of Black Pad failures that can cause fracture embrittlement at the interface between the solder and the metal pad. As yet, there is no conclusive agreed solution to effectively eliminate Black Pad failures. The case studies presented are intended to add to the understanding of the Black Pad failure mechanism and to identify both the plating and the subsequent assembly processes and conditions that can help to prevent the likelihood of Black Pad occurring.
Circuit Technology Center, Inc.
New Equipment | Cleaning Agents
AQUANOX® A4708 is a neutral range pH chemistry designed to rapidly clean under densely populated low-gap PWB assemblies. AQUANOX® A4708 is effective on all flux types including no-clean and water soluble residues. AQUANOX® A4708 is specifically form
Industry News | 2016-06-10 09:45:09.0
Cranston RI - Technic is pleased to announce the installation of the TechniPad Electroless Palladium process AT7015 at Gold Plating Services (GPS) in Santa Clara CA. GPS is a contract plating service specializing in precious metal plating for the printed circuit board industry.
Complex functions are compressed on ever less room while simultaneously an enhancement in performance must be obtained. With coated Bonding pads in various designs Heraeus Materials Technology offers customer oriented solutions that aid the increas
Industry Directory | Manufacturer
Manufacturer of advanced process chemistry for plating, masking and stripping. Custom manufacturing of automated equipment for electrodeposion including; hoist systems, reel-to-reel and continuous vertical processing equipment.
Industry Directory | Manufacturer
Nepes offers flip chip solutions ranging from wafer bumping to advanced packaging and testing for IC manufactures, module electronics and end-product makers.
