May 23, 2011 #1 D devil6600 Full Member level 5 Joined Nov 15, 2008 Messages 250 Helped 7 Reputation 14 Reaction score 7 Trophy points 1,298 Activity points 2,931 i have seen in many calculators and other cheap hand held game consoles (especially from china) that they use a round shaped IC inside instead of a square or rectangular. why is it so and why round shaped? thanks
i have seen in many calculators and other cheap hand held game consoles (especially from china) that they use a round shaped IC inside instead of a square or rectangular. why is it so and why round shaped? thanks
May 23, 2011 #2 bigdogguru Administrator Joined Mar 12, 2010 Messages 9,821 Helped 2,350 Reputation 4,694 Reaction score 2,272 Trophy points 1,413 Location Southwest, USA Activity points 62,383 Like this? epoxy/resin casted IC ---------- Post added at 04:22 ---------- Previous post was at 04:18 ---------- Moisture resistance, high temp for reflow ovens, etc.
Like this? epoxy/resin casted IC ---------- Post added at 04:22 ---------- Previous post was at 04:18 ---------- Moisture resistance, high temp for reflow ovens, etc.
May 23, 2011 #3 KJ6EAD Advanced Member level 3 Joined Oct 6, 2010 Messages 709 Helped 196 Reputation 392 Reaction score 194 Trophy points 1,323 Location Earth Activity points 5,092 It's called a chip-on-board (COB) device. Here's a brief description: Chip-on-Board (COB); Direct Chip Attachment (DCA) and a more detailed tutorial: Die Products Consortium: Chip on Board Tutorial and here's a typical manufacturer of these products: **broken link removed**.
It's called a chip-on-board (COB) device. Here's a brief description: Chip-on-Board (COB); Direct Chip Attachment (DCA) and a more detailed tutorial: Die Products Consortium: Chip on Board Tutorial and here's a typical manufacturer of these products: **broken link removed**.