(r7) MCMDCis < DetDev

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---+ Inter-strip capacitance measurments

*Measurements performed by Alex Chilingarov, University of Lancaster and analysis is done by Lars Eklund, University of Glasgow.*

---+++ *Reverse current vs. voltage and vs. time, w14 (6 um BCB)*

<img width="596" alt="IV curves" src="%ATTACHURL%/w14IV.gif" height="372" />

Explanation of plot legend, see below

<img width="596" alt="I vs time at 600V" src="%ATTACHURL%/w14IvsTime.gif" height="372" />

---+++ 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

<img width="596" alt="Cis vs V at 100kHz" src="%ATTACHURL%/w14CisV100kHz.gif" height="372" />

<img width="596" alt="Cis vs V at 1 MHz" src="%ATTACHURL%/w14CisV1MHz.gif" height="372" />

*Plot legend description: XNYM-KK-A/B/C/D-GNDPlaneType*

Coordinates on the wafer are given by *N* and *M* and the number of the measured strip is given by *KK*

The measurements were done in four different configurations of the bias rail connection:

<table width="774" height="84" border="0"><tbody><tr><td style="width: 5%"> *A* </td><td style="width: 60%"> Ampere meter and 1 MOhm connected between bias rail and HV return </td><td style="width: 30%">GND plane floating (DC) <br /></td></tr><tr><td style="width: 10px"> *B* </td><td style="width: 10px"> Ampere meter and 1 MOhm connected between bias rail and HV return</td><td style="width: 10px">GND plane bonded to bias rail <br /></td></tr><tr><td style="width: 10px"> *C* </td><td style="width: 10px"> Bias rail connected directly to HV return<br /></td><td style="width: 10px"> GND plane floating (DC)</td></tr><tr><td style="width: 10px"> *D* </td><td style="width: 10px"> Bias rail connected directly to HV return</td><td style="width: 10px"> GND plane bonded to bias rail </td></tr></tbody></table>

The GND plane types are: <table width="760" height="74" border="0"><tbody><tr><td style="width: 5%"><strong>bcb<br /></strong></td><td style="width: 90%">Sensor covered only by BCB layer (6+3 um)<br /></td></tr><tr><td style="width: 10px"> *M25* </td><td style="width: 10px">Sensor with meshed GND plane (25 % fill factor and 37 um line width)<br /></td></tr><tr><td style="width: 10px"> *solid* </td><td style="width: 10px"> Sensor solid solid GND plane<br /></td></tr><tr><td style="width: 10px"> *bare* </td><td style="width: 10px"> No BCB and no GND plane: sensors from an old production batch </td></tr></tbody></table>

<img width="596" alt="Cis vs time at 100 kHz" src="%ATTACHURL%/w14CisTime100kHz.gif" height="372" />

<img width="596" alt="Cis vs time at 1 MHz" src="%ATTACHURL%/w14CisTime1MHz.gif" height="372" />

-- Main.LarsEklund - 16 Dec 2008

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
gif	w14CisTime100kHz.gif	r3 r2 r1	manage	8.5 K	2008-12-18 - 19:52	LarsEklund
gif	w14CisTime1MHz.gif	r3 r2 r1	manage	8.6 K	2008-12-18 - 19:53	LarsEklund
gif	w14CisV100kHz.gif	r3 r2 r1	manage	13.8 K	2008-12-18 - 19:53	LarsEklund
gif	w14CisV1MHz.gif	r3 r2 r1	manage	13.6 K	2008-12-18 - 19:53	LarsEklund
gif	w14IV.gif	r3 r2 r1	manage	10.9 K	2008-12-18 - 19:54	LarsEklund
gif	w14IvsTime.gif	r4 r3 r2 r1	manage	8.1 K	2008-12-18 - 19:55	LarsEklund

Topic revision: r7 - 2008-12-19 - LarsEklund

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