OPSOL UK have developed an Electronic manufacturing facility in Northern Europe to supply PCB's, metalwork such as Heatsinks, and electronic assemblies. We have Philips SMT equipment as well as thru hole capability. 2 hours from the UK. Check us out
Electronics Forum | Sun Mar 28 18:49:36 EDT 2021 | mekmat544
Hello, I would like to ask you if there is some formula how to calculate PTH hole and annual ring for pin in paste technology? Thank you. Mekmat.
Electronics Forum | Thu Jun 10 19:10:05 EDT 2021 | kojotssss
Hi, Get your account. https://software.indium.com/stencil-coach/pin-in-paste-apertures.php
Industry News | 2012-04-06 15:32:39.0
GPD Global, a manufacturer of precision fluid dispensing systems for high-volume 24/7, low-volume/high-mix and R&D production, announces the global release of its PCD4 Dispense Pump after its successful release and testing in the North American market.
Industry News | 2013-01-11 17:04:51.0
GPD Global will exhibit in Booth #739 at the upcoming Strategies in Light conference and exhibition, scheduled to take place February 12-14, 2013 at the Santa Clara Convention Center in California.
Parts & Supplies | SMT Equipment
Juki nozzle 105 for 705 smt machine Description: Brand:JUKI Color:plated gold Material:imported steel Nozzle model:101 102 103 104 105 106 Application:Juki 750 smt machine Customize:yes Nozzle advantage: 1.The nozzle main body adopts impor
Parts & Supplies | SMT Equipment
Juki nozzle 105 for 705 smt machine Description: Brand:JUKI Color:plated gold Material:imported steel Nozzle model:101 102 103 104 105 106 Application:Juki 750 smt machine Customize:yes Nozzle advantage: 1.The nozzle main body adopts impor
Technical Library | 2023-02-13 18:56:42.0
This paper describes the results of an intensive whisker formation study on Pb-free assemblies with different levels of cleanliness. Thirteen types of as-received surface-mount and pin-through-hole components were cleaned and intentionally contaminated with solutions containing chloride, sulfate, bromide, and nitrate. Then the parts were assembled on double-sided boards that were also cleaned or intentionally contaminated with three fluxes having different halide contents. The assemblies were subjected to high-temperature/high-humidity testing (85_C/85% RH). Periodic examination found that contamination triggered whisker formation on both exposed tin and solder fillets. Whisker occurrence and parameters depending on the type and level of contamination are discussed. Cross-sections were used to assess the metallurgical aspects of whisker formation and the microstructural changes occurring during corrosion.
Technical Library | 2018-09-21 10:12:53.0
Moisture accumulates during storage and industry practice recommends specific levels of baking to avoid delamination. This paper will discuss the use of capacitance measurements to follow the absorption and desorption behaviour of moisture. The PCB design used in this work, focused on the issue of baking out moisture trapped between copper planes. The PCB was designed with different densities of plated through holes and drilled holes in external copper planes, with capacitance sensors located on the inner layers. For trapped volumes between copper planes, the distance between holes proved to be critical in affecting the desorption rate. For fully saturated PCBs, the desorption time at elevated temperatures was observed to be in the order of hundreds of hours. Finite difference diffusion modelling was carried out for moisture desorption behaviour for plated through holes and drilled holes in copper planes. A meshed copper plane was also modelled evaluating its effectiveness for assisting moisture removal and decreasing bake times. Results also showed, that in certain circumstances, regions of the PCB under copper planes initially increase in moisture during baking.
SMT Express, Volume 2, Issue No. 3 - from SMTnet.com Volume 2, Issue No. 3 Thursday, March 16, 2000 Featured Article Return to Front Page Stencil Design for Mixed Technology Through-hole / SMT Placement and Reflow by William E. Coleman, Photo
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/b-dimension-in-mounting-hole_topic2765_post11131.html
. For Non-Plated Through-hole the "b" dimension should be larger than the hole size. Probably the hole tolerance +/- 0.05 annular ring. If the hole is non-plated, you want the drill bit to go through FR4 material and not touch any copper to avoid copper slivers in the hole
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