File:Topre PCBs (back) - FR-4 Glass Epoxy and FR-2 Paper Phenol.JPG

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Description Underside view of two PCBs taken from separate Topre keyboards. The green one at the top is a glass epoxy type, and the brown one is a paper phenol type. It's suspected that Topre only use the glass epoxy type for their modern keyboards.
Source Own work
Date 2013-09-22
Author 002
Licence Public domain or nearest equivalent

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current07:26, 22 September 2013Thumbnail for version as of 07:26, 22 September 20132,184 × 1,456 (911 KB)002 (talk | contribs){{imagedesc | description = Underside view of two PCBs taken from separate Topre keyboards. The green one at the top is a glass epoxy type, and the brown one is a paper phenol type. It's suspected that Topre only use the glass epoxy type for th...
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