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name="MCMD" |
Inter-strip capacitance measurments
Measurements performed by Alex Chilingarov, University of Lancaster and analysis is done by Lars Eklund, University of Glasgow. |
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< | Summary plots for w14 (6 um BCB) |
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< | Total current vs. voltage for all measured sensors on wafer 14 |
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> | Reverse current vs. voltage and vs. time, w14 (6 um BCB) |
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< | Capacitance between one central strip to its two neighbours vs. bias voltage for 100 kHz and 1 MHz |
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> | Explanation of plot legend, see below |
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< | All measurements done with 1 Mohm resistor and an ampere meter connected between the bias rail and
the HV return (ground) except for the measurement X5Y1/2 where bias rail was connected directly to the ground |
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Inter-strip capacitance measurements, w 14 (6 um BCB)
Capacitance was measured between one strip and its two nearest neighbours at 100 kHz and 1 MHz.
The measurement consists of a bias voltage ramp, then the sensor is kept at maximal voltage.
See below for plot legend |
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< | Time evolution of the capacitance of one strip to its two neighbours at 600 V |
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> | Plot legend description: XNYM-KK-A/B/C/D-GNDPlaneType |
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< | All measurements done with 1 Mohm resistor and an ampere meter connected between the bias rail and
the HV return (ground) except for the measurement X5Y1/2 where bias rail was connected directly to the ground |
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> | Coordinates on the wafer are given by N and M and the number of the measured strip is given by KK |
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> | The measurements were done in four different configurations of the bias rail connection: |
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> | | A | Ampere meter and 1 MOhm connected between bias rail and HV return | GND plane floating (DC)
| | B | Ampere meter and 1 MOhm connected between bias rail and HV return | GND plane bonded to bias rail
| | C | Bias rail connected directly to HV return
| GND plane floating (DC) | | D | Bias rail connected directly to HV return | GND plane bonded to bias rail |
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< | Evolution of reverse curret at 600 V |
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> | The GND plane types are: bcb
| Sensor covered only by BCB layer (6+3 um)
| | M25 | Sensor with meshed GND plane (25 % fill factor and 37 um line width)
| | solid | Sensor solid solid GND plane
| | bare | No BCB and no GND plane: sensors from an old production batch |
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-- LarsEklund - 16 Dec 2008 |
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