Industry Directory | Manufacturer
Supplier of high quality engineered materials, including conductive and resistive inks, UV curable dielectrics and insulators, adhesives, coatings, transducer inks and potting compounds.
Layer: 8 layers Material: FR-4 Board Thickness: 0.6mm Surface Finish: Immersion Gold 1~4u Copper Thickness: 1/3 oz Impedance, 4/4mils width/spacing Layers: 2--36layers Max manufacturing size: 640mm*1100mm Copper foil thickness: 0.5OZ-13OZ M
New Equipment | Design Services
Layer：4 Material：FR-4 4/4/4/4oz Thickness：2.0 Minimum hole：0.35mm Minimum Tracc/Spacing：12mil/15mil Application：power supply Layers: 2--36layers Max manufacturing size: 640mm*1100mm Copper foil thickness: 0.5OZ-13OZ Min line width/space:
Electronics Forum | Sat Sep 20 07:11:28 EDT 2008 | Sean
Hello All, I used to hear that PCB with immersion silver finishing, its non component location pads, tend to be discolour (Yellowish) after went through heat cycle, such as reflow oven. However, if the component solderbility on the PCB is OK, can w
Electronics Forum | Thu Aug 29 17:51:43 EDT 2002 | nifhail
I have seen several Imm Ag pad on the assembled board which have a copper colorleaching through the silver plating This happened on the pad which was not deposited with paste during the assembly process. Don't know if it is a problem, but we only h
Industry News | 2012-05-04 09:21:15.0
As printed boards evolve and chip speeds increase, the use of microwave technology in commercial applications, such as cell phone towers and in military products, is expanding.
Industry News | 2003-04-10 10:27:46.0
IPC and JEDEC Send Out Call for Papers
Parts & Supplies | Circuit Board Assembly Products
PULANG TECHNOLOGY CO,.LTDOffers electronic manufacturing services including PCB designing, electronic contract manufacturing including electronic product design, electronic product development, electronic product repair, PCB manufacturing, electronic
Technical Library | 2016-11-17 14:37:41.0
With increasing LED development and production, thermal issues are becoming more and more important for LED devices, particularly true for high power LED and also for other high power devices. In order to dissipate the heat from the device efficiently, Au80Sn20 alloy is being used in the industry now. However there are a few drawbacks for Au80Sn20 process: (1) higher soldering temperature, usually higher than 320°C; (2) low process yield; (3) too expensive. In order to overcome the shortcomings of Au80Sn20 process, YINCAE Advanced Materials, LLC has invented a new solderable adhesive – TM 230. Solderable adhesives are epoxy based silver adhesives. During the die attach reflow process, the solder material on silver can solder silver together, and die with pad together. After soldering, epoxy can encapsulate the soldered interface, so that the thermal conductivity can be as high as 58 W/mk. In comparison to Au80Sn20 reflow process, the solderable adhesive has the following advantages: (1) low process temperature – reflow peak temperature of 230°C; (2) high process yield – mass reflow process instead of thermal compression bonding process; (3) low cost ownership. In this paper we are going to present the die attach process of solderable adhesive and the reliability test. After 1000 h lighting of LED, it has been found that there is almost no decay in the light intensity by using solderable adhesive – TM 230.
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.
SIPAD Systems Incorporated (SSi) is the Exclusive Supplier of SIPAD solid solder deposit in North America and the only SIPAD Solid Solder Deposit (SSD) coating service bureau in the world. SIPAD Systems Inc. supplies SIPAD solid solder coating servi
Events Calendar | Mon Apr 23 00:00:00 EDT 2018 - Thu Apr 26 00:00:00 EDT 2018 | Shanghai, China
SMTA China East Conference 2018
Challenges of Lead-Free Low Silver Content End Termination Pastes for Inductor Applications Challenges of Lead-Free Low Silver Content End Termination Pastes for Inductor Applications The silver end termination plays an important role
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/test-types/first-bond-ball-pull-stud-bump-pull?con=t&page=8
. First bond ball pull utilises cold bump pull jaw technology to apply a vertical load (a pull test) to ball bonds and stud bumps. Ball shear tests can sometimes promote pad cratering due to the aggressive nature of the bonding process which can weaken the ball bonds
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm
, David Braun Abstract 22-2 EFFECTS OF STORAGE PROCEDURES AND BAKE OUT ON THE SOLDERABILITY OF IMMERSION SILVER-COATED PRINTED CIRCUIT BOARDS Paul Vianco, et al. Abstract 22-1 A CASE STUDY FOR TRANSITIONING CLASS A SERVER MOTHERBOARDS TO LEAD-FREE R
