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Irradiacion
Irradiacion.WebHomer1.9 - 08 Jun 2010 - 09:26 - EliseoPerezTrigotopic end

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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
  • 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):

  • 0.1 (8 h, estimated 12.5 Krad/h at 360 mm from the source)
  • 0.2 (8 h)
  • 0.3 (8 h)
  • 0.5 (16 h)
  • 0.8 (24 h)
  • 1.2 (24 h)
  • 1.7 (40 h)
  • 2.3 (48 h)
  • 3.0 (56 h)
  • 5.0 (160 h)
  • 7.5 (200 h)
  • 10 (200 h)

IV curves

Broken Transistor before irradiation: chip0=10, chip1=15, chip2=8

Adaptor Boards photos

  • Testing Board:

Testing Board

  • Irradiation Board:

Irradiation Board

  • Chips_Holder Board:

Chips_Holder Board
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I Attachment sort Action Size Date Who Comment
chip0_25t_43r_.25s.xlsx manage 200.5 K 03 Jun 2010 - 17:31 PabloVazquez Chip 0
chip1_25t_44r_.25s.xlsx manage 174.8 K 03 Jun 2010 - 17:32 PabloVazquez Chip 1
BoardsLayout.xlsx manage 1159.6 K 03 Jun 2010 - 17:36 PabloVazquez Multi Transistor: biasing voltages; Adaptor Board: pin assignment;
Chip_0_1_bad.pdf manage 531.6 K 03 Jun 2010 - 17:56 PabloVazquez Broken transistors
Chip_0_1_2_bad.pdf manage 537.9 K 04 Jun 2010 - 12:13 PabloVazquez Broken transistors
chip2_25t_44r_250ms.xlsx manage 226.0 K 04 Jun 2010 - 12:15 PabloVazquez Chip 2
testing_board.JPG manage 341.9 K 08 Jun 2010 - 09:24 EliseoPerezTrigo Testing Board
irradiation_board.JPG manage 421.0 K 08 Jun 2010 - 09:27 EliseoPerezTrigo Irradiation Board
chip_holder_board.JPG manage 367.4 K 08 Jun 2010 - 09:30 EliseoPerezTrigo Chips_Holder Board

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