Hello, You can easily Obtain what you need from Filmtronics they have an excellent line of doping materials from spin-on dopant sources , diffusion preforms and solid planar sources. I think you can easily accomplish what you need to do with the Poly Boron Film they make or their B216 and do this easily obtaining 25 micron depth. Please contact them at 724 352 3790 or sales at Filmtronics.com They can easily help you. Neal >Hello All, >We are trying to perform boron diffusion on silicon and hoping to achieve >depths in the range of 20 to 25um. I spoke to a couple of companies who do >ion implantation and they suggested i go with thermal diffusion of boron as >against ion implantation. What do you guys think? Any suggestions or >comments would be greatly appreatiated. > >Thanks, >vinay Neal Christensen 675 Saxonburg Rd. Box 1571 Butler, PA 16003-1571 USA T-724-352-4433 F-724-352-7680 neal@zbzoom.net