PCB Libraries, Inc. | https://www.pcblibraries.com/forum/0402-min-size-land-pattern_topic30_post6316.html
". In IPC, i saw that Sm=Lm-2xTM, but i don't find the same result than in the calculation tab. For example, for a 0805 resistor, i will have Sm=1.85+2x0.65=0.55 while i obtain
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic30&OB=DESC.html
". In IPC, i saw that Sm=Lm-2xTM, but i don't find the same result than in the calculation tab. For example, for a 0805 resistor, i will have Sm=1.85+2x0.65=0.55 while i obtain
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| http://www.feedersupplier.com/buy-samsung_sm471_feeders-page2.html
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PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_creating-a-centroid-cpl-file-bottom-side-data_topic2611.xml
. The IPC-SM-782 was around for 18 years with Pin 1 Lower Left. One person (Jamie Smith) who never attended any Land Pattern meetings or any IPC development meetings attended the 2004 IPC APEX meeting and he questioned the Pin 1 Zero Component Orientation should be changed to the Upper
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/v2020-library-expert-enterprise-features_topic2423.html
) IPC has been promoting adding 0.05 mm (2 mil) annular ring to every pad since IPC-SM-782's release in March 1987. The concept was that the fabrication etching process could "over-etch" and therefore reduce the resulting pad size
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2423&OB=DESC.html
) IPC has been promoting adding 0.05 mm (2 mil) annular ring to every pad since IPC-SM-782's release in March 1987. The concept was that the fabrication etching process could "over-etch" and therefore reduce the resulting pad size
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/v2020-library-expert-enterprise-features_topic2423_post9968.html
) IPC has been promoting adding 0.05 mm (2 mil) annular ring to every pad since IPC-SM-782's release in March 1987. The concept was that the fabrication etching process could "over-etch" and therefore reduce the resulting pad size
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_library-expert-2016-09-released_topic1934.xml
modulesCalculator:Updated the Land Pattern Naming Convention for 2-pin Chip, Molded Body and SOD parts to match IPC-7351CUpgraded 2-pin parts for the silkscreen to map to the real component body outlineLibrary
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/standard-chip-package-case-codes-dimensions_topic2440_post11864.html
& Dimensions Posted: 07 Feb 2022 at 10:01am IPC-7351B contains the 3-Tier Density Levels for Land Patterns. However, that document is 12 years old and out of date and it took information from the 1987 IPC-SM-782 which is obsolete
IPC is the trade association for the printed wiring board and electronics assembly industries.
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