From ernie@physics.carleton.ca Mon Jan 12 17:49:29 2004 Date: Fri, 17 Oct 2003 15:02:46 -0400 (EDT) From: Ernie Neuheimer To: Madhu@physics.carleton.ca Cc: Kirsten Sachs Subject: Resistivity Check of Dupont Type 100XC Carbon-loaded Kapton Film Received for James Ochsner on 6Oct.'03. X-IMAPbase: 1426689760 1 Status: O X-Status: X-Keywords: X-UID: 1 Madhu, I did a resistivity check on the Kapton 100XC film which James Ochsner recently sent us. For the record, I have attached the e-mail from James describing this film below. An e-mail from Andy Whyman pricing both broad and narrow range film also included. Although James states that 8 sq.ft. was sent, it is less. A strip about 48" wide x 12" long was sent. This I cut into six sheet about 8" x 12". I made mesurements with the new four-point probe and the new Keithley model 2400 Sourcemeter. Voltage readings across the 5mm-pitch sense terminals was from ~20 to ~50mV and thus the voltage gradient was about 100mV/cm or less, still very much in the linear response range of the film. Measurements were made in the center of each sheet in the X and Y directions and on both dull and shiny sides. The measured voltages and calculated resistances in MegOhms per square are tabled below. Sheet#: Vmeas. @I. Cal. Res. Resistance mV. nA. KOhm. MegOhm/sq. #1: (Avg.) dull-Y: 17.74 100 177. 0.802 " -X: 18.98 " 190. 0.861 shiny-Y: 18.69 " 187. 0.847 " -X: 17.61 " 176. 0.797 (.827) #2: dull-Y: 36.01 100 360. 1.63 " -X: 50.23 " 502. 2.28 shiny-Y: 46.05 " 460. 2.08 " -X: 43.34 " 433. 1.96 (1.99) #3: dull-Y: 29.84 100 298. 1.35 " -X: 28.76 " 288. 1.30 shiny-Y: 27.35 " 274. 1.24 " -X: 30.87 " 309. 1.40 (1.32) #4: dull-Y: 41.70 100 417. 1.88 " -X: 37.11 " 371. 1.68 shiny-Y: 33.47 " 335. 1.58 " -X: 42.90 " 429. 1.94 (1.77) #5: dull-Y: 54.53 100 545. 2.47 " -X: 57.68 " 577. 2.61 shiny-Y: 50.60 " 506. 2.29 " -X: 43.96 " 440. 1.99 (2.34) #6: dull-Y: 17.32 100 173. 0.784 " -X: 17.79 " 178. 0.806 shiny-Y: 16.59 " 166. 0.752 " -X: 14.66 " 147. 0.666 (0.752) Conclusion: As mentiomed by James Ochsner, the edge sheets (#1 and #6) are somwhat lower in surface resistance than the middle portion (sheets) of the 48" strip supplied. This may be due to some process non-uniformity and should be kept in mind when buying from a roll. The narrow range resistivity film (such as the 100XC10E6 used at TRIUMF) is very expensive (see quote below). Once our present supply is gone, it may be more cost effective to buy the broad range film and select areas with useful resistance. Ernie. ------------------------------------------------------------ ---------- Forwarded message ---------- Date: Fri, 3 Oct 2003 13:49:01 -0400 From: Andy Whyman To: ernie@physics.carleton.ca Cc: Beth L Allison , James P Ochsner , Thomas E Clyde Subject: Pricing for Kapton 100XC10E6 Ernie Jim Ochsner has sent you about 8 sq ft of sample from the roll that seemed to best meet your needs. This is a small roll.... about 4 ft wide X 60 ft long. You recently asked Beth Allison about pricing. I will respond on her behalf First I need to correct the information in the note that I recently sent to you that referrred to an estimated price of $7.00 US/lb. This was a typo...it should have read $7.00 US/sq ft. My apologies. Standard Kapton 100XC10E6 with a broad resistivity range is priced at $4.00 US/sq ft. The minimum order amount would be $3000 US or 750 sq ft. Below this a $300.00 setup charge would apply. If you need a custom product with similar tolerances to those of Triumf, this would be a special production run. The minimum quantity that we can produce is 20, 000 sq ft. and the price would be $6.50 US/sq ft. The maximum width is 48 in. Do you have an estimate of the quantity that you will need for development and for the final production ? Thanks and best regards Andy Whyman To: Andy Whyman/CAN/DuPont@DuPont cc: Subject: Re: Dupont Type XC Carbon-loaded Kapton Film. (Document link: Database 'Andy Whyman', View '($Inbox)') Andy, I sent the sample to Ernie yesterday. At 1V/cm it measured 1.5 to 2.0 x 10E6 Ohms/sq. across most of the sheet, but did get some reading slightly below 10E6 near one edge. I expect the other edge is lower as well. I was just making some quick checks to make sure I had the right roll, and I only checked one edge. Jim