On Sat, 22 Jan 2005 12:27:24 -0700, you wrote:

>Why not just mount the transistor on the bottom of the board?
>
>Alternatively, and probably not usable by automated assemblers,
>(unless they can drop a part and push?)
>punch/route a rectangular hole in the board and have the part
>hang by it's leads into the hole.
>
>Spehro Pefhany wrote:
>
>> At 09:26 AM 1/20/2005 +1300, you wrote:
>> 
>>> Is anyone aware of a surface mount photo transistor (or other optical
>>> sensor) that is available on tape packaged face down ?
>>> We currently use 0805 LEDs supplied in that manner but I haven't found
>>> a sensor. Volumes are too high for hand placement but not high enough
>>> to influence a semi supplier.
>>>
>>> Steve.
>> 
>> 
>> Ummm... could you use an LED?
>
>Good idea. Although LED's have much poorer sensitivity,
>they are photoelectric. It seems they have best gain when
>seeing their own color of light (at least for the half
>dozen types I played with).
>
>Robert


Not sure if this got through last time I posted it...

Vishay gull-wing parts available in normal and reverse orientation and taping. 
Try www.ebv.com for pricing

 TEMT 1000 (phototransistor) 
http://www.vishay.com/docs/81554/81554.pdf

TEMD 1000 (photodiode) 
http://www.vishay.com/docs/81564/81564.pdf

TSML1000 (IR LED) 
http://www.vishay.com/docs/81033/81033.pdf

I know Agilent do something similar to the LED, 
but quite a lot more expensive - they may also do detectors in the same package. 


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