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Nov 26, 2013
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Make PC Boards the Simplest Way! The Kit includes: *Board Creator Hobbyists Software
*Press-N-Peel Image Transfer Film
*Bottle of Etching Chemical
*Copper Clad Board
*Software Manual
*Complete Instructions for making PC Board
Features of Board Creator Software:
*Boards up to 10 x 8 in. up to 6 layers with 8 masks each. *Built-in print queue up to 10 masks. *User selectable cursor layout grid. Up to 1 mil resolution. Items not limited to grid. *Net list compatible to logic simulator. *Full surface mount device support. *Multiple line widths. Lines from 0. 001 to 0. 255 inches wide. *Up to 10 different pad shapes and sizes. Custom shapes. Change pad per layer. *Multiple text attributes per board. Set size, boldness, and more. *Full support for power and ground planes, with or without thermal relief. *Interactive part placement. Rats Nest prompting for optimal component placement and manual routing. *Built-in design rule checking, locates and displays errors on-screen.
Circuit Board manufacturer | PCB Prototype | PNC Inc. US
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Mouse Bites ¶
Taken from this mentor graphics blog post. 0. 5mm diameter holes with 1mm between holes gives 0. 5mm of board between holes to hold the board within the panel. Having the centerline of the mouse bite holes 0. 25mm above the milled board edge helps minimize cleanup after the boards are depanelized. Placement of Breakaway Tabs ¶
The space between the breakaway tabs shouldn't exceed 10cm to help keep the boards rigid in the panel during assembly. Plane Pull Back ¶
The planes should be pulled back at least 1mm from the mouse bites. For best EMI/EMC performance all signals should have an unbroken plane underneath them, so any signal traces should also be at least 1mm away from the mouse bites. When depanelizing there is a fair amount of flex stress that the boards go through. Components (especially chip resistors and capacitors) should be kept at least 2-3mm away from the mouse bites. Paste Stencils ¶
Paste stencils are something I do not have a lot of experience with and because of this I tend to follow the advice of others.
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In general, you would want your paste stencils apertures to have rounded holes to help keep the paste from sticking to the stencil. Also, the specific size of the apertures, in particular the ratio of the aperture to the pad they are allowing paste for is a science unto itself. I was pointed to the SMTA for specifics. At the time of writing this (Dec 21, 2014) I have been using the general rules given by this document (copied locally for posterity) as a starting point. Basic rules of thumb:
Round the corners of the paste apertures. Reduce the size of the paste apertures by 1-2mil to prevent excess paste from being applied and causing shorting problems. Eagle does not easily allow you to round the edges of the paste ("cream" in Eagle parlance) layers. I've submitted a feature request to them. Eagle's DRC rules allow you to round pads but not the stop mask or cream layers. Eagle does, however, allow you to easily adjust the stencil aperture size in the same DRC menu. Look under the "Masks" tab:
Here you can see that I've asked Eagle to make the cream apertures 95% of the pads they are covering, up to a maximum of 2mil.
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Very competitive price structure for Prototype PC Boards
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We participate KANBAN and JIT Programs
High Volume production from our offshore partners at very attractive prices. Our offshore boards are 100% tested, inspected and certified by PNC USA before shipped. A printed circuit boards serves as "The Chassis of Electronics". In today's race to market new products, quick turn PC boards can give you the edge you need to stay above the competition. PNC Inc. is the kind of reliable PC board manufacturer you can count on to give you speedy PCB prototype runs and also has the longevity (in business for over 48 years) to be here when your prototype PCBs turns into a production. Please allow us to quote your requirements from Prototype PC Boards to mid & high volume production runs.
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