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: SON / QFN Calculations SON / QFN Calculations : Ooops! I just noticed that the... Author: jnelso09Subject: 889Posted: 15 Mar 2013 at 1:34pmOoops! I just noticed that the previously posted pic shows exactly the opposite of what I'm talking about - The center land is minimized and the outer lands are maximized
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/son-qfn-calculations_topic889_post3258.html
(thermal) land dimensions for QFN/SON is fundamentally flawed. Why? Because it assumes maximum tolerance dimensions for the center land and then trims the inside of the peripheral lands to achieve the desired gap around the center pad
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: 16 May 2012 Location: San Diego Status: Offline Points: 423 Post Options Post Reply Quote Jeff.M Report Post Thanks(0) Quote Reply Topic: QFN Dual Row Posted: 22 Jul 2013 at 9:54am There is already and option to make dual row QFN's it's just not among the standard QFN family of parts
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/qfn-dual-row_topic1032.html
: 16 May 2012 Location: San Diego Status: Offline Points: 423 Post Options Post Reply Quote Jeff.M Report Post Thanks(0) Quote Reply Posted: 22 Jul 2013 at 9:54am There is already and option to make dual row QFN's it's just not among the standard QFN family of parts
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic889&OB=DESC.html
: 20 Post Options Post Reply Quote jnelso09 Report Post Thanks(0) Quote Reply Topic: SON / QFN Calculations Posted: 15 Mar 2013 at 1:34pm Ooops! I just noticed that the previously posted pic shows exactly the opposite of what I'm talking about - The center land is minimized and the outer lands are maximized
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic889&OB=ASC.html
(thermal) land dimensions for QFN/SON is fundamentally flawed. Why? Because it assumes maximum tolerance dimensions for the center land and then trims the inside of the peripheral lands to achieve the desired gap around the center pad
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1032&OB=ASC.html
: 16 May 2012 Location: San Diego Status: Offline Points: 423 Post Options Post Reply Quote Jeff.M Report Post Thanks(0) Quote Reply Posted: 22 Jul 2013 at 9:54am There is already and option to make dual row QFN's it's just not among the standard QFN family of parts
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1032&OB=DESC.html
: 16 May 2012 Location: San Diego Status: Offline Points: 423 Post Options Post Reply Quote Jeff.M Report Post Thanks(0) Quote Reply Topic: QFN Dual Row Posted: 22 Jul 2013 at 9:54am There is already and option to make dual row QFN's it's just not among the standard QFN family of parts
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