Technical Library | 2024-04-08 15:46:36.0
A designed experiment evaluated the influence of several variables on appearance and strength of Pb-free solder joints. Components, with leads finished with nickel-palladium-gold (NiPdAu), were used from Texas Instruments (TI) and two other integrated circuit suppliers. Pb-free solder paste used was tin-silver-copper (SnAgCu) alloy. Variables were printed wiring board (PWB) pad size/stencil aperture (the pad finish was consistent; electrolysis Ni/immersion Au), reflow atmosphere, reflow temperature, Pd thickness in the NiPdAu finish, and thermal aging. Height of solder wetting to component lead sides was measured for both ceramic plate and PWB soldering. A third response was solder joint strength; a "lead pull" test determined the maximum force needed to pull the component lead from the PWB. This paper presents a statistical analysis of the designed experiment. Reflow atmosphere and pad size/stencil aperture have the greatest contribution to the height of lead side wetting. Reflow temperature, palladium thickness, and preconditioning had very little impact on side-wetting height. For lead pull, variance in the data was relatively small and the factors tested had little impact.
Industry News | 2011-04-06 13:13:52.0
Dow Electronic Materials will showcase its innovative materials for printed circuit boards (PCBs) at this year’s IPC APEX EXPO. Dow will feature a number of its latest products that are tailored to meet the requirements of increasingly complex circuit boards while delivering ever-higher reliability and consistency. Dow’s next-generation of high quality, cost-effective technologies allow customers to meet future market requirements.
Industry News | 2021-03-03 14:17:42.0
New CIT Relay & Switch IP67 Process Sealed VM3S Series Snap-Action Switch Protects Against Environmental Distress
Industry News | 2016-01-05 13:57:47.0
Barry Industries announces the introduction of a RoHS-compliant flange mount RF termination, T50R0-500-15X, which dissipates 500W with favorable return loss over a DC to 4.5GHz bandwidth. Barry Industries is an ISO9001:2008 certified ITAR registered manufacturer of high quality thick film resistors, terminations, attenuators and high temperature co-fired ceramic (HTCC) packaging.
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Layer Count: 8L Board Thickness: 1.0mm Panel Dimension:190*86mm/2up Material: S1141 Copper on board surface: 35μm Min Hole Diameter: 0.1mm Min line Width/Space: 8/8mil Surface Finish: ENIG+Selective OSP in BGA area This quick turn PCB is manufacture
Industry News | 2018-10-18 11:08:03.0
Different Techniques for Plating
Printed Circuit Boards FR4 1.6mm 94V0 Solar Panel Rigid PCB Quik Details: Product Name: Solar Panel Rigid PCB Base Material: FR4 Epoxy Resin Bare Board Size: 120mm x155mm Surface Finishing: Leaded HASL PCB Material Flamming rate: 94
New Equipment | Fabrication Services
8 Layers Printed Circuit Boards Manufacturing Multilayer PCB Fabrication Product Name: Multilayer PCB Board Material: FR4 Copper thickness 1 oz all layers Board Thickness: 1.6mm Special requirement Impendence Control Fab by Circuit Boar
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New Equipment | Industrial Automation
Sales Manager: Sandy Lin Email: unity@mvme.cn Skype:onlywnn_1 Mobile(Whatsapp): (+86)-18020776786 yuehang: Shipping Term : TNT,DHL,FEDEX,ETC Payment Term : T/T Warranty: 12 month yuehang supply： New+original+factory sealed+high quality
Industry News | 2023-04-04 14:43:55.0
CIT's new DM3 Series of Ultra Subminiature Switches are available in Four Different Actuator Types
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