Dear Prem Pal, There are several candidates that could solve your problems and fit your needs....I will mention a couple that we at MicroChem are aware of and manufacture.... PMGI - PMGI is a polymer that lends itself very nicely to this application...It is spin coatable to a wide variety of Film Thicknesses....It planarises very easily under controlled bake conditions....Requires the use of Standard Resist processing techniques..And can be removed easily by using standard photoresist developers or removers.... LOR - Is a PMGI based resist layer, generally used in a bi-layer scheme as a Lift-Off Resist....It's dissolution rate in aqueous developers is inherently faster than PMGI and may be better suited as a sacrificial layer....Again this product is available in a wide variety of film thicknesses....This product has been used successfully as a sacrificial layer beneath SU-8 in MEMS applications.....Requires the use of Standard Resist processing techniques..And can be removed easily by using standard photoresist developers or removers.... I hope this is of use to you....If you need any more information please contact me.... Mark Shaw Product Development & Applications Manager MicroChem Corp. 1254 Chestnut Street, Newton, MA. 02464 Tel : 617-965-5511 ext.308 Fax : 617-965-5818 -----Original Message----- From: mems-talk-request@memsnet.org [mailto:mems-talk-request@memsnet.org] Sent: Monday, September 24, 2001 12:01 PM To: mems-talk@memsnet.org Subject: mems-talk digest, Vol 1 #52 - 6 msgs Send mems-talk mailing list submissions to mems-talk@memsnet.org To subscribe or unsubscribe via the World Wide Web, visit http://fab.mems-exchange.org/mailman/listinfo/mems-talk or, via email, send a message with subject or body 'help' to mems-talk-request@memsnet.org You can reach the person managing the list at mems-talk-admin@memsnet.org When replying, please edit your Subject line so it is more specific than "Re: Contents of mems-talk digest..." Today's Topics: 1. BCB and bonding (daria_doria@tin.it) 2. material for sacrifacial layer (Prem Pal) 3. Density of Polysilicon (Aitor Endemano) 4. vendor for 12inch Pt and NiCr target (Biao Li) 5. Re: replacement for strain gauges (e.calius@irl.cri.nz) 6. Making small diameter holes in glass (Danny Klein) --__--__-- Message: 1 From:To: mems-talk@memsnet.org Date: Fri, 21 Sep 2001 18:15:41 CEST Subject: [mems-talk] BCB and bonding Dear All, we are looking for information about bonding with BCB. Does anybody know how BCB works with high temperature? Is it thermosensitive? Does its adhesion change with temperature? Let us know D.Doria --__--__-- Message: 2 From: "Prem Pal" To: mems-talk@memsnet.org Date: Fri, 21 Sep 2001 16:43:42 +0000 Subject: [mems-talk] material for sacrifacial layer
hello friendsI am trying to find out the material which can be spin coated on surface topography and can be planerise by using CMP or some other means and finally can be used as a sacrifacial layer in surface micromachining technology. any kind of information about this material would be highly appreciated.
thax in advance
>
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--__--__-- Message: 3 From: Aitor EndemanoReply-To: A.Endemano@hw.ac.uk To: mems-talk@memsnet.org Date: Fri, 21 Sep 2001 18:57:43 +0100 (GMT Daylight Time) Subject: [mems-talk] Density of Polysilicon Dear colleagues, Does anybody know the typical value for the density of the polysilicon. Cheers, Aitor Endemano Isasi ------------------------------------------------------------- Aitor Endemano Isasi - PhD Student Dpt. of Computing & Electrical Eng. Heriot Watt University - Riccarton Edinburgh EH14 4AS - SCOTLAND Tlf: +44 (0)131 449 5111 ext.4159 Fax: +44 (0)131 451 3327 E-mail: A.Endemano@hw.ac.uk --__--__-- Message: 4 From: Biao Li To: "'mems-talk@memsnet.org'" Date: Fri, 21 Sep 2001 20:58:24 -0400 Subject: [mems-talk] vendor for 12inch Pt and NiCr target Hello, we need 12-inch Pt and NiCr targets for MRC sputtering system. any information about vendors are appreciated. Biao Li --__--__-- Message: 5 Date: Mon, 24 Sep 2001 10:19:40 +1200 From: e.calius@irl.cri.nz Organization: Industrial Research Limited To: Conrad Trevelyan CC: mems-talk@memsnet.org Subject: Re: [mems-talk] replacement for strain gauges If you're interested in measuring the strain on the surface of a part, in the same way as you would with a strain gage, then the only MEMS device that I'm aware of is the BiAST (BiAxial Strain Transducer) being developed by Sarcos (http://www.sarcos.com/memsspec_uast.html). It is actually better described as a micro-extensometer rather than a strain gage, but with a gage length of around 10 millimeters, its output should be similar to that of a small strain gage. The most interesting features are: * practical resolution of the order of 1 microstrain. * onboard A/D conversion, so that the sensor actually communicates digitally with the data acquisition system with the obvious consequences for noise. * potentially reusable, as the MEMS device package is attached by something like screws to the stems of 3 mounting pads which are bonded to the surface whose strain is to be measured. This is important because initially, at least, these sensors will be considerably more expensive than normal strain gages. These devices will hopefully become available in the next few months. If you'd like some more information, I can forward a couple of papers in PDF format. There are of course non-MEMS alternatives to electrical strain gages based on fibre optics. If you learn of any other MEMS-based strain measurement devices, please let us know. -- Emilio --------------------------------------------------------------------- Dr Emilio P. Calius Research Engineer: Smart Materials and Structures Industrial Research Limited PO Box 2225, Auckland, New Zealand Ph: +64 9 303 4116, Fax: +64 9 307 0618 --__--__-- Message: 6 From: "Danny Klein" To: Date: Mon, 24 Sep 2001 14:34:17 +0200 Subject: [mems-talk] Making small diameter holes in glass This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C14505.FD98FF20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear MEMS colleagues, As a part of my thesis I am interested in making several small = diameter holes (100-200 micron) in a thin layer of glass (400-500 = micron), along a 20 mm line. Then I need to fill the holes with gold or = any other metal. I would like to know if anyone knows any methods to drill or etch = those holes in glass ( Pyrex, BK-7, CdTe, BaF2 or any other material = that allows transmission in the visible and IR wavelengths as well). I would appreciate if anyone can tell me of a manufacturer that can make = these holes.=20 =20 P.S. I choose glass because of its relative high thermal isolation = property. Thank you in advance, Danny Klein ----------------------------------------------------- Danny Klein Faculty of Mechanical Engineering Technion, Israel Institute of Technology Haifa, 32000 Israel Tel: 972-4-8292946 Email: dannykl@tx.technion.ac.il ---------------------------------------------------- ------=_NextPart_000_0007_01C14505.FD98FF20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear MEMS colleagues,As a part of my thesis I = am=20 interested in making several small diameter holes (100-200 micron) in a = thin=20 layer of glass (400-500 micron), along a 20 mm line. Then I need to fill = the=20 holes with gold or any other metal.I would like to know = if anyone=20 knows any methods to drill or etch those holes in glass ( Pyrex, = BK-7,=20 CdTe, BaF2 or any other material that allows transmission in the visible = and=20 IR wavelengths as well).I would appreciate if anyone can tell me = of a=20 manufacturer that can make these holes.P.S. I choose glass because of = its relative=20 high thermal isolation property.Thank you in advance,
Danny Klein-----------------------------------------------------Danny Klein
Faculty of Mechanical Engineering
Technion, = Israel=20 Institute of Technology
Haifa, 32000
IsraelTel: 972-4-8292946
Email: dannykl@tx.technion.ac.il< /= DIV>----------------------------------------------------------=_NextPart_000_0007_01C14505.FD98FF20-- --__--__-- _______________________________________________ mems-talk mailing list mems-talk@memsnet.org http://fab.mems-exchange.org/mailman/listinfo/mems-talk End of mems-talk Digest