RadFET monitors for SVD 2.0 =========================== 1. "small" RadFET monitors -------------------------- All "small" RadFET monitors that will be used for 2 and 4 layer of SVD2.0 were checked by the RadFET reader. Summary (voltages are in volt, and the reader operates at +-18V): sensor# U(k1) U(k2) status ------------------------------ 0 short 9.91 test1 1 short 9.77 test1 2 9.53 short test1 3 9.43 10.86 test1 4 9.39 9.39 ok 5 9.36 9.37 ok 6 9.42 9.44 ok 7 9.34 9.33 ok 8 9.40 9.40 ok 9 9.47 9.48 ok 10 9.44 9.46 ok 11 9.45 9.51 ok 12 9.46 9.47 ok 13 9.48 9.48 ok 14 9.42 open test2 15 9.39 9.44 ok 16 11.65 9.50 k1 will be imposible to calibrate, k2 ok 17 9.50 9.50 ok 18 9.37 9.38 ok 19 9.44 9.45 ok 20 9.46 open test2 21 9.50 short test2 22 open 10.55 test2 Out of 23 produced sensors, 14 of them (60%) are fully ok (we need 12, 2 are spares). We are using 8 sensors (0-3, 14, 20-22) for RadFET calibration, and we can keep sensor 16 as a half-working spare. 2. "large" 1st layer RadFET monitors ------------------------------------ sensor# U(k1) U(k2) U(k3) U(k4) status ---------------------------------------------- 1 9.53 9.37 9.39 9.40 ok 2 9.85 9.68 9.39 9.39 ok 3 9.66 9.57 short 9.43 1 sensor bad 4 9.57 9.40 9.43 9.39 ok 6 9.58 9.40 9.43 9.39 ok 7 9.60 9.43 9.36 9.32 ok 8 9.70 9.53 9.42 9.39 ok Only one sensor has one radfet that is not working. The encapsulation must be re-checked and corrected where necessary, bare bonding wires might break during mounting. Will check it. Response of the PIN diodes must still be checked (using a light source). Date: Fri, 23 Aug 2002 04:58:00 +0900 From: zag07358 To: stanic@beauty.bk.tsukuba.ac.jp Subject: PT100 This is the result of PT100 test. I tested resistance of the PT100 on hybrids. ################################################### Large hybrids (which have PIN diode, RadFET and PT100) # 1 2 3 4 5 6 7 8 resistance (ohm) 112 112 112 112 112 112 112 112 small hybrids (which have only RadFET and PT100) # 4 5 6 7 8 9 resistance (ohm) 113 113 113 113 113 113 ################################################### Best reguards, Terazaki Hideaki