Another funny looking Cree emitter....

Dan C · Dec 16, 2006

I just bought three of the P4's in a group buy, and two of them look like this. Sorry about the poor picture, but only about half of it has the yellow/green phosphor coating. I don't know the correct terminology, but the center square part with the wires is fully coated, but only half the part behind it is. My question, how is this going to effect performance? Is it even worth building with one? Opinions (or facts) eagerly awaited, I'm ready to build a sandwich with it.......Thanks.

Dan C

x2x3x2 · Dec 16, 2006

hmmm... missing bond wires, now coating problems.
btw, do the ones with half coats produce less light?

Raybo · Dec 16, 2006

Dan C said:
I just bought three of the P4's in a group buy, and two of them look like this. Sorry about the poor picture, but only about half of it has the yellow/green phosphor coating. I don't know the correct terminology, but the center square part with the wires is fully coated, but only half the part behind it is. My question, how is this going to effect performance? Is it even worth building with one? Opinions (or facts) eagerly awaited, I'm ready to build a sandwich with it.......Thanks.

Dan C

Fire'er up!

Ray

PhotonWrangler · Dec 16, 2006

If the center chip die is fully coated, it should be ok. However I suspect that a little bit of blue light might leak out of the right edge of the die and produce uneven bluish artifacts.

From the photo it almost looks as if the right side of the substrate was chipped off. :thinking:

Mike Painter · Dec 17, 2006

If they look almost identical it could be that they have developed a way to just coat what needs to be coated and saved .0001 cents or less per unit.
When you talk about tens of millions of such things *any* saving can mean big dollars at the end.

chesterqw · Dec 18, 2006

well...if they make a million of them, $0.01x1million= $$

Another funny looking Cree emitter....

Dan C

Enlightened

x2x3x2

Banned

Raybo

Enlightened

PhotonWrangler

Flashaholic

Mike Painter

Flashlight Enthusiast

chesterqw

Flashlight Enthusiast

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