454 nsmd bga thermal pad results

Solder Mask Defined Variant - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/solder-mask-defined-variant_topic2303.html

minimize capacitance. With NSMD pads, the pour-connected pads end up with extra exposed copper.  They are effectively starved for solder paste, since the paste only covers the nominal pad area

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Solder Mask Defined Variant - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2303&OB=ASC.html

minimize capacitance. With NSMD pads, the pour-connected pads end up with extra exposed copper.  They are effectively starved for solder paste, since the paste only covers the nominal pad area

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Questions & Answers - PCB Libraries Forum - Page 3

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:40am 8 4276 By Tom H 20 Mar 2013 at 12:31pm BGA Pad Size Calculation By robmeyer , 20 Feb 2015 at 12:57am 1 4211 By Tom H 20 Feb 2015 at 9:14am SMD (Solder Mask Defined

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Questions & Answers - PCB Libraries Forum - Page 3

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:40am 8 4276 By Tom H 20 Mar 2013 at 12:31pm BGA Pad Size Calculation By robmeyer , 20 Feb 2015 at 12:57am 1 4211 By Tom H 20 Feb 2015 at 9:14am SMD (Solder Mask Defined

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•  Wet and Dry Film mask •  Photoimageable soldermask •  Via Protection 22 Fine Pitch BGA Microvia In Pad Strategies 23 PCB Assembly Design Considerations

| https://www.eptac.com/wp-content/uploads/2013/08/eptac_08_21_13-1.pdf

PCB Libraries Forum : Library Expert 2016.12 Released!!

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_library-expert-2016-12-released_topic1974.xml

; ColumnUpdated SM, BGA, TH and Sample FPX files with a Date / Time columnAltium:Added a new translator option for outputting Stroke Text FontFIXED:Calculator:Updated Footprint Naming convention for parts with Thermal Tabs

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PCB Libraries Forum : IPC-7351B Land Pattern Naming Convention Flaws

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_ipc7351b-land-pattern-naming-convention-flaws_topic2336.xml

;QFN25P40_400X300X80L40X20T265Another issue is the BGA component family. If all the BGA dimensions are the same except the Baal Diameter ranges from 0.30 - 0.50 the IPC Calculator would produce a duplicate land pattern name for every BGA even though the Pad Size would be different. 

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PCB Libraries Forum : Paste Mask Question

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_paste-mask-question_topic2342.xml

. Should the stencil be same size as the pad, smaller or greater? I know that in BGA packages we want very few solder paste on the pad

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Questions & Answers - PCB Libraries Forum - Page 17

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:05am Silkscreen width By julien.meilhac , 06 Nov 2014 at 7:02am 8 4711 By julien.meilhac 02 Jul 2015 at 12:09am Pad size controll By tccab , 06 Jul 2015 at 11

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Questions & Answers - PCB Libraries Forum - Page 20

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:16pm OrCAD PCB Designer By pgugis , 10 Oct 2015 at 3:09am 1 249 By Nick B 10 Oct 2015 at 3:13am BGA with Square Pins By AlexBeale , 03 Oct 2015 at 7

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