Industry Directory | Consultant / Service Provider / Distributor / Manufacturer / Other
Ludee Circuits offer RoHS PCB.We could offer leadfree HASL,Entek, flash gold, immersion gold, immersion silver, immersion tin finishing based on standard FR-4, CEM-3 materials, Teflon, Rogers RO4000 series, as well as high Tg S1170 materials.
Industry Directory | Manufacturer
PCB Global is a dedicated Prototype Quick Turn High Tech. PCB supplier - Quotes and orders can be processed 24/7/365 - free online quotation visit www.pcbglobal.com
Technical Library | 2016-11-17 14:58:02.0
Since 2006 RoHS requirements have required lead free solders to take the place of tin-lead solders in electronics. The problem is that in some environments the lead free solders are less reliable than the older tin-lead solders. One of the ways to solve this problem is to corner stake, edge bond or underfill the components. When considering what mitigation technique and material to use, the operating conditions must be characterized. The temperature range is important when selecting a material to use since the glass transition temperature (Tg) and coefficient of thermal expansion (CTE) are important properties. If improperly chosen, the mitigation material can cause more failures than an unmitigated component.
Technical Library | 2015-07-01 16:51:43.0
Aerospace and military companies continue to exercise RoHS exemptions and to intensively research the long term attachment reliability of RoHS compliant solders. Their products require higher vibration, drop/shock performance, and combined-environment reliability than the conventional SAC305 alloy provides. The NASA-DoD Lead-Free Electronics Project confirmed that pad cratering is one of the dominant failure modes that occur in various board level reliability tests, especially under dynamic loading. One possible route to improvement of the mechanical and thermo-mechanical properties of solder joints is the use of Pb-free solders with lower process temperatures. Lower temperatures help reduce the possibility of damaging the boards and components, and also may allow for the use of lower Tg board materials which are less prone to pad cratering defects. There are several Sn-Ag-Bi and Sn-Ag-Cu-Bi alloys which melt about 10°C lower than SAC305. The bismuth in these solder compositions not only reduces the melting temperature, but also improves thermo-mechanical behavior. An additional benefit of using Bi-containing solder alloys is the possibility to reduce the propensity to whisker growth
New Equipment | Fabrication Services
Quantity: 5pcs Lead Time: 7 working days Number of layers: 2 layers Max board dimensions: 6300x3900mils/160x100mm Material: R-4, Tg130 Finished Thickness: 63mil/1.6mm Min Trace/space: 6mil/0.15 Min.Holes size: 12mil/0.3mm Copp
New Equipment | Fabrication Services
Quantity: 5pcs Lead Time: 7 working days Number of layers: 4 layers Max board dimensions: 6300x3900mils/160x100mm Material: R-4, Tg130 Finished Thickness: 63mil/1.6mm Min Trace/space: 6mil/0.15mm Min.Holes size: 12mil/0.3mm Co
New Equipment | Fabrication Services
Quantity: 10pcs Lead Time: 9 working days Number of layers: 2 layers Max board dimensions: 6300x3900mils/160x100mm Material: R-4, Tg130 Finished Thickness: 63mil/1.6mm Min Trace/space: 4mil/0.1mm Min.Holes size: 12mil/0.3mm Co
New Equipment | Fabrication Services
Quantity: 10pcs Lead Time: 9 working days Number of layers: 4 layers Max board dimensions: 6300x3900mils/160x100mm Material: R-4, Tg130 Finished Thickness: 63mil/1.6mm Min Trace/space: 4mil/0.1mm Min.Holes size: 12mil/0.3mm Co
New Equipment | Assembly Services
China Double Sided Circuit Boards Fabricaiton and Assembly PCBA Turnkey Manufacturer 2 Layers circuit boards PCB FR4 1.6mm PCB fabrication and assembly 1oz PCB copper thickness Shenzhen PCB and PCBA manufacturer China turnkey contract electroni
