Dear Yanying Feng, I work for a company named Moxtek and we used to make a film that was treated such that specific locations were hydrophobic and other locations that were hydrophilic. Our purpose was to deposit drops of solution onto a specific location and let them dry so all of the solute deposited into hydrophilic regions for x-ray chemical analysis. The dried spots served to preconcentrating a volume of solution to achieve better sensitivity during analysis. We developed a patented process for this work. The patent numbers that are relevant are US patent # 5,958,345 and patent #5,544,218. If you need further assistance, contact me at 801 225-0930 Andrew J. Nielson MEMS products manager MOXTEK, INC Orem, Utah -----Original Message----- From: shay kaplan [mailto:shay@mizur.com] Sent: Sunday, January 13, 2002 11:49 PM To: mems-talk@memsnet.org Subject: Re: [mems-talk] If there is any method to make some domains hydrophobic and theothers hydrophilic in microchannels? you can try coating hydrofilic areas with teflon, parylene etc to make the hydrofobic Shay Kaplan Yanying Feng wrote: > Dear Lady or Gentlmen: > I want to form some surface pattern of hydrophility in microchannels.Is there any method to make some domains hydrophobic and the other hydrophilic in silicon microchannels? The microchannel is constructed by bonding a silicon substrate with etched channels to a Pyrex glass coverslip. Thank you any way! > > > With best regards > > Yanying Feng > fengyy@post.pim.tsinghua.edu.cn > ________________________________________________________ > MEMS Lab > Department of Precision Instruments and Mechanology > Tsinghua University > Beijing > P. R. China > 100084 > _________________________________________________________ > _______________________________________________ > mems-talk@memsnet.org mailing list: to unsubscribe or change your list > options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk > Hosted by the MEMS Exchange, providers of MEMS processing services. > Visit us at http://www.mems-exchange.org/ _______________________________________________ mems-talk@memsnet.org mailing list: to unsubscribe or change your list options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk Hosted by the MEMS Exchange, providers of MEMS processing services. Visit us at http://www.mems-exchange.org/