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Non-Symmetric Tolerance Question? - PCB Libraries Forum Forum Home > PCB Footprint Expert > Questions & Answers New Posts FAQ Search Events Register Login Non-Symmetric Tolerance Question
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Nominal/Tolerance Not Available in 2021.03 FP Pro - PCB Libraries Forum Forum Home > PCB Footprint Expert > Questions & Answers New Posts FAQ Search Events Register Login Nominal/Tolerance Not Available in
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2883&OB=ASC.html
Nominal/Tolerance Not Available in 2021.03 FP Pro - PCB Libraries Forum Forum Home > PCB Footprint Expert > Questions & Answers New Posts FAQ Search Events Register Login Nominal/Tolerance Not Available in
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_disclaimer_topic2478.xml
. We believe that the values provide best industry practice for padsize and spacing calculations. However, every user, has the opportunity tochange any of the solder joint goal values for toe, heel and side, themanufacturing tolerances and the terminal lead tolerance to calculate a landpattern
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/land-pattern-calculation-of-gull-wing-lead-parts_topic1314_page1.html
. These 7 factors are used to calculate the optimum Land Size Component Body Tolerance – ± 4 Mil (0.1) thru ± 12 (0.3) Component Terminal Tolerance – ± 8 Mil (0.2) thru ± 20 Mil (0.5
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/land-pattern-calculation-of-gull-wing-lead-parts_topic1314_post5184.html
. These 7 factors are used to calculate the optimum Land Size Component Body Tolerance – ± 4 Mil (0.1) thru ± 12 (0.3) Component Terminal Tolerance – ± 8 Mil (0.2) thru ± 20 Mil (0.5
Imagineering, Inc. | https://www.pcbnet.com/capabilities/assembly/technology-roadmap/
(HDI) Finish Hole Size • Mechanical Drill - 4 mil (HDI) • Laser Drill - 2.5 mil (HDI) True Hole Position +/-.0015" Finish Hole Size Tolerance • PTH - +/-.0015" • Non-PTH - +/-.001" Aspect Ratio (Board Tks./FHS) 30 Heavy Copper
Imagineering, Inc. | https://www.pcbnet.com/capabilities/fabrication/technology-roadmap/
(HDI) Finish Hole Size • Mechanical Drill - 4 mil (HDI) • Laser Drill - 2.5 mil (HDI) True Hole Position +/-.0015" Finish Hole Size Tolerance • PTH - +/-.0015" • Non-PTH - +/-.001" Aspect Ratio (Board Tks./FHS) 30 Heavy Copper
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_son-qfn-calculations_topic889.xml
. Same idea though - just switch the center pad to maximum tolerance and trim the outer lands. SON / QFN Calculations : This might also help to clarify... Author: jnelso09Subject: 889Posted: 15 Mar 2013 at 1
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/disclaimer_topic2478.html
. We believe that the values provide best industry practice for pad size and spacing calculations. However, every user, has the opportunity to change any of the solder joint goal values for toe, heel and side, the manufacturing tolerances and the terminal lead tolerance to calculate a land pattern
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