Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2022/06/Vacuum-Fluxless-Reflow-Technology-for-Fine-Pitch.pdf
]. With the trend of requiring more functions and performance, bump pitch scaling poses significant challenges in the plated solder bump reflow process, e.g
Surface Mount Technology Association (SMTA) | https://www.smta.org/news/smta_calendar/calendar.cfm
design completion. All these issues play a part of the design, manufacturing and performance of our end products. Attendees will receive an understanding of how to create good design-data, allowing for manufacturing tolerance allowances . The goal is to
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm
– Low Temperature Co-Fired Ceramic (LTCC) Technology for High Temperature Electronics P. Vianco, J. Rejent, M. Grazier, A. Kilgo, B. McKenzie, A. Allen, E. Guerrero and W. Price Abstract 29-2 Long Term Aging Effects on the Reliability of Lead Free Solder Joints in Ball Grid Array Packages with Various Pitch Sizes and Ball Arrangements Cong Zhao, Chaobo Shen, Zhou Hai
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/resources/solder-dictionary-of-terms
). F Fillet Solder formation at the intersection of surfaces of a solder connection. Fine Pitch Centerline spacing of leads 0.5 mm (20 mils) or less. Flux A material that cleans metal surfaces of absorbed gases, oxide films, and other surface contaminants
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/v2020-library-expert-enterprise-features_topic2423.html
++ or IPC-2581 data that you provide them. If IPC is adding a fabrication tolerance and the manufacturer is allowing for their tolerance, I call that a " double tolerance ", thus making the calculation of the pad size too robust
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2423&OB=DESC.html
++ or IPC-2581 data that you provide them. If IPC is adding a fabrication tolerance and the manufacturer is allowing for their tolerance, I call that a " double tolerance ", thus making the calculation of the pad size too robust
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/v2020-library-expert-enterprise-features_topic2423_post9968.html
++ or IPC-2581 data that you provide them. If IPC is adding a fabrication tolerance and the manufacturer is allowing for their tolerance, I call that a " double tolerance ", thus making the calculation of the pad size too robust
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/bga-pad-size-calculation_topic594_post2030.html
specifies a tolerance range of +/-0.05 mm so the tolerance range is 0.40 mm Minimum Pad Size 0.45 mm Nominal Pad Size 0.50 mm Maximum Pad Size The IPC-7351 standard
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/bga-pad-size-calculation_topic594_post1945.html
: My BGA is 18x18 0.8mm pitch with 0.4mm balls 1) It seems to output 0.35mm pads for all of L, N and M - does that make sense? 2) Looking at the table above there is no entry for
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/bga-pad-size-calculation_topic594_post2751.html
specifies a tolerance range of +/-0.05 mm so the tolerance range is 0.40 mm Minimum Pad Size 0.45 mm Nominal Pad Size 0.50 mm Maximum Pad Size The IPC-7351 standard
