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r1.11 - 28 Jun 2010 - 06:18 -
PabloVazquez
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---+ Irradiation of DEFET transistors with CO60 souce at Santiago ---++ Procedure 2 chips with 30 bonded transistors will be irradiated in several steps. Biasing voltages and Adaptor Boards pin assingment can be seen in * [[%ATTACHURL%/BoardsLayout.xlsx][BoardsLayout.xlsx]]: Multi Transistor biasing voltages; Adaptor Board pin assingment; Dose Setup information Ids_Vgs curves will be done before irradiation and after each step. What we are interesting in is: Threshold Voltage, transconductance, substhreshold swing ---+++ Measuring steps from 0 to 10 Mrad (in Mrad) dose ~ 11.5 Krad/h): * 0.1 (9 h) I1: 24.6:14h -> 24h ; T1: 25.6:9h ->12h * 0.2 (9 h) I2: 25.6:12h -> 21h : T2: 28.6:9h -> 12h * 0.3 (9 h) I3: 28.6:12h %H% * 0.5 (18 h) * 0.8 (27 h) * 1.2 (27 h) * 1.7 (45 h) * 2.3 (54 h) * 3.0 (63 h) * 5.0 (180 h) * 7.5 (225 h) * 10 (225 h) ---++++ IV curves * [[%ATTACHURL%/chip0_25t_43r_.25s.xlsx][chip0_25t_43r_.25s.xlsx]]: Chip 0 * [[%ATTACHURL%/chip1_25t_44r_.25s.xlsx][chip1_25t_44r_.25s.xlsx]]: Chip 1 * [[%ATTACHURL%/chip2_25t_44r_250ms.xlsx][chip2_25t_44r_250ms.xlsx]]: Chip 2 ---++++ Broken Transistor before irradiation: chip0=10, chip1=15, chip2=8 * [[%ATTACHURL%/Chip_0_1_2_bad.pdf][Chip_0_1_2_bad.pdf]]: Broken transistors ---+++ Adaptor Boards photos * Testing Board: <br /> <img src="%ATTACHURLPATH%/testing_board.JPG" alt="Testing Board" width="1024" height="768" /> * Chips_Holder Board: <br /> <img src="%ATTACHURLPATH%/chip_holder_board.JPG" alt="Chips_Holder Board" width="1024" height="768" /> * Irradiation Board: <br /> <img src="%ATTACHURLPATH%/Irradiation_board2.JPG" alt="Irradiation Board" width="1024" height="768" />
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