Re:A look at an original iPhone prototype
by omilu on Friday March 22, 2019 @07:53AM
(#19461640)
Is the checkerboard pattern on the top layer for aesthetics, or is it functional for EMI reduction.
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Re:A look at an original iPhone prototype
by jeffwheeler on Friday March 22, 2019 @11:50AM
(#19463706)
I suspect this is to avoid warping on a large board. They probably used hatching to match the amount of copper on the top and bottom of the board.