Electronics Forum | Mon May 14 17:12:20 EDT 2001 | davef
Continuing along the path that Brian took ... IPC-7525 gives design guideline for stepped stencils. It goes something like: * Stepped area SB GT 25 thou from pads located on the greatest thickness of the stencil * Pads in stepped area SB GT 35 tho
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
SMTnet Express, December 30, 2021, Subscribers: 26,039, Companies: 11,482, Users: 26,994 " ---> Effects of PCB Substrate Surface Finish and Flux on Solderability of Lead-Free SAC305 Alloy The solderability of the SAC305 alloy
Surface Mount Technology Association (SMTA) | https://www.smta.org/education/presentations/presentations.cfm
+125oC for 5800 cycles. It was observed that ENIG surface finish improves the component reliability comparing to OSP and ImAg. It is also observed that matching solder sphere with solder paste alloys improves the reliability in several cases, but a significant improvement was not observed when compared with the SAC305 solder spheres
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