I think you need metallic/conductive coating to shield RF. Silicon will pass RF thru. There are newer plastic material with metallic anodizing that can shield RF and gaining popularity in its use as casing. Rgds, Peter Tiang. =================================================== ----- Original Message ----- From: "John Waters" To: Sent: Saturday, April 21, 2001 6:18 AM Subject: [OT] What is Silicone Conformal Coating? > Hi All, > > I saw in the electronic component store a kind of chemical called "Silicone > Conformal Coating", is it used for providing a layer of protective coating > covering up the PCB? If so, will high frequency signal(say, up to 12 > MHz)leak through this kind of coating? > > Thanks in advance! > > John > > > > _________________________________________________________________________ > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu