Tape has a higher Impedance. So, it can be used, but you not doing yourself a favor.What about using 3M 8810 or 8815 thermal tape? Anyone gone down this road yet?
Cree CXA 3070 ( 3000K -80Ra ) for 2500 hours at 1.5 A , Ta= 35 C.
Results of Poorly applied TIM (Arctic silver 5 ) and overtighten IDEAL holder ..
Temperature of LES was well beyond 100 C .
Still none of the COBs chips was fried .
COB WAS fully operational .
Until dissection was done ...
View attachment 3426017
View attachment 3426019
View attachment 3426020
View attachment 3426021
^^^ Epoxy glued chips on the ceramic board.
I aligned stencil with back of Vero 29 and marked the position of 4 hole position on stincil. Then aligned the 4 holes in stencil with the 4 holes on heatsink and applied TIM. Then Vero on top and moved it a little back and forth to even out TIM.You might try outlining the Cob on the heatsink surface before applying the paste. Done this way you would only need to insure the contact was square with the TIM layer and aim for the circle.
I'd think two tubes would be enough if you are frugal, AS5 is pretty thin compared to promiltech.So how many tubes of arctic silver 5 should I order for a 24 cob(cxa 3070) build?
Thank youI'd think two tubes would be enough if you are frugal, AS5 is pretty thin compared to promiltech.
Hey P,Its very easy to work with, the double sided sticky pads, and mine are still fine after a few months of 12/12
...decoding... then for my pov the cobs leds needs temp protection against hot temps... driver dimmed or totaly off....external driver temp sensor way... sens leds temps...(maybe thermistor way)...Cree CXA 3070 ( 3000K -80Ra ) for 2500 hours at 1.5 A , Ta= 35 C.
Results of Poorly applied TIM (Arctic silver 5 ) and overtighten IDEAL holder ..
Temperature of LES was well beyond 100 C .
Still none of the COBs chips was fried .
COB WAS fully operational .
Until dissection was done ...
View attachment 3426017
View attachment 3426019
View attachment 3426020
View attachment 3426021
^^^ Epoxy glued chips on the ceramic board.