Plated vs non-plated

You couldn't Google that basic question?

One hole is plated, the other isn't. Obviously.

Of course PTH is the standard spec, because that is what most people want and need. There are also reasons you want some holes to be specified as non-PTH, but that's another question.

Dave.

Punched boards? Which boards are punched - very high volume consumer appliance on phenolic?

It is less standard with punched boards.

Best regards, Spehro Pefhany

Yes, and also some relatively high volume commercial and consumer boards using epoxy-glass.

Best regards, Spehro Pefhany

punch'n'crunch, baby.

An historical note: There was a period, in the late '60s, if memory serves, that the military was banning the use of plated through holes (holes with plating to make electrical contact between pads on more than one layer). The reason was that the PTH technology was not advanced enough to provide reliable connections. During that period, manufacturers had to place wires or electrical components through the holes, and make solder connections on both sides. This was viable, of course, only for 2 layer boards. Today, of course, the military allows PTHs. Regards, Jon

And in that same era, Philips manufactured a series of two-way radios in Australia (the FM1680 series for those in the region) which used eyelets as the through-board connection. Talk about a baaaad move. The eyelets provided an endless supply of intermittent/dry joints. The recommended fix of soldering top and bottom only resulted in ... a second generation of intermittent/dry joints.

Geez, isn't punching epoxy-glass boards a high tool wear process? .