Bringing in silica microspheres

Mary Tang mtang at
Thu Jun 30 21:32:57 PDT 2011

Hi Jonathan --

This is fine.  We do not allow silica microspheres to be spun coated in 
the lab (i.e., not on the litho spin coaters), but once they are adhered 
to a wafer, they are generally safe to process, especially if your wet 
processing is at wbgeneral or wbgaas.

I'm presuming you are etching to obtain your texturing -- where will you 
be doing this?


On 6/30/2011 7:23 PM, Jonathan P Mailoa wrote:
> Hi
> My name is Jonathan Mailoa, coral id jpmailoa. I would like to bring in quartz
> wafers coated with a monolayer of silica microspheres.
> The monolayer formation is done outside of SNF, so I am planning to use only the
> gold contaminated equipment. My goal is to obtain a specific quartz texture
> profile by etching the coated quartz wafer.
> Can you let me know if this is allowed, or what other information I should
> provide?
> Thanks
> Jonathan

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