Soldering to glass

[Phil Hobbs]

On 2020-04-20 16:13, legg wrote:

On Mon, 20 Apr 2020 21:05:00 +0200, Piotr Wyderski
peter.pan@neverland.mil> wrote:

legg wrote:

I think alumina can serve as an insulator, while improving
thermal characteristics. Simple copper-on-alumina fabs are
already available.

Available -- yes, one can buy DBC boards, but it might be too expensive
for one-offs.

Glass? Who needs it?

It is dirt cheap and easily available.

Best regards, Piotr

Glass is not always glass, but it's better than dirt.

I think this guy's a brit?

https://www.ebay.co.uk/itm/1PC-Copper-clad-100-100mm-insulation-sheet-alumina-ceramic-circuit-board-/254524509314

RL

"Item location: China"

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[legg]

On Mon, 20 Apr 2020 21:05:00 +0200, Piotr Wyderski
<peter.pan@neverland.mil> wrote:

legg wrote:

I think alumina can serve as an insulator, while improving
thermal characteristics. Simple copper-on-alumina fabs are
already available.

Available -- yes, one can buy DBC boards, but it might be too expensive
for one-offs.

Glass? Who needs it?

It is dirt cheap and easily available.

Best regards, Piotr

Glass is not always glass, but it's better than dirt.

I think this guy's a brit?

https://www.ebay.co.uk/itm/1PC-Copper-clad-100-100mm-insulation-sheet-alumina-ceramic-circuit-board-/254524509314

RL

 

On Mon, 20 Apr 2020 10:55:32 -0700 (PDT), whit3rd <whit3rd@gmail.com>
wrote:

On Monday, April 20, 2020 at 8:07:21 AM UTC-7, legg wrote:
On Sun, 19 Apr 2020 10:30:31 +0200, Piotr Wyderski
peter.pan@neverland.mil> wrote:

I have recently conducted some research on binding SMD components with
glass and ceramic substrates ...

I think alumina can serve as an insulator, while improving
thermal characteristics. Simple copper-on-alumina fabs are
already available.

Glass? Who needs it?

Porcelain-on-steel is a common heavy-duty circuit substrate; i've got
a few relay boards in my junk box of that construction. It also tolerates
environments (like oil baths) that few polymers can handle, and has excellent
heatsinking capability.

We have used these resistors

https://www.dropbox.com/s/0hbgfkvvg3xf6cg/Welwyn.JPG?raw=1

in an application where high-power cycling broke wirewounds.

It's porcelain on thin steel. It comes cupped a bit, so when you screw
it down it hugs the heat sink.




--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard