Technical Library | 2010-04-29 21:40:37.0
The purpose of this paper is to investigate the effects of reflow time, reflow peak temperature, thermal shock and thermal aging on the intermetallic compound (IMC) thickness for Sn3.0Ag0.5Cu (SAC305) soldered joints.
Technical Library | 2023-08-04 15:27:30.0
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.
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 | 2018-11-14 15:48:25.0
Indium Corporation will feature its ultra-reliable Indium8.9HF Solder Paste series at IPC APEX EXPO 2019, Jan. 29-31, in San Diego, California, USA.
Industry News | 2008-02-29 16:42:42.0
ITASCA, IL � January 7, 2008 � Kester will provide lead-free resources, technologies and products in booth 1660 at the upcoming APEX 2008 exhibition and conference, scheduled to take place April 1-3, 2008, in Los Vegas.
SemiPack's fully automated tinning services restore the finish and soldering properties of leads for both through-hole and surface mount devices. SemiPack provides both RoHS-SnPb and SnPb-RoHS conversions. Tinned components are processed in com
Technical Library | 2014-06-19 18:13:23.0
For high-density electronic packaging,the application of flip-chip solder joints has been well received in the microelectronics industry. High-lead(Pb) solders such as Sn5Pb95 are presently granted immunity from the RoHS requirements for their use in high-end flip-chip devices, especially in military applications. In flip-chip technology for consumer electronic products, organic substrates have replaced ceramic substrates due to the demand for less weight and low cost. However, the liquidus temperatures of high-Pb solders are over 300°C which would damage organic substrates during reflow because of the low glass transition temperature. To overcome this difficulty, the composite solder approach was developed...
EzPCB offers various kinds of surface finishing technology, including Sn/Pb, Ni/Au, immersion gold, chemical silver etc. Lead-free OSP finishing technology is our newly introduced service, and is welcomed by customers in the EU, US and in Austrilia.
New Equipment | Solder Materials
Made for high speed leaded assembly. No Clean Solder Paste, Alloy: Sn63/Pb37, Type 3 Powder -325+500, 250 gram jar. Buy one or two jars on line. While supplies last.
Used SMT Equipment | Soldering - Selective
Pillarhouse Orissa 600 Selective Solder System SN # OR048 (2) Solder Pots Including: (1) Lead and (1) Lead Free Pots Operator Manual Drop Jet Fluxer Auto Solder Wire Feeder Internal Fume Extraction Black & White Programmi
