Difference: MCMDCsG (1 vs. 4)

Revision 42009-04-08 - LarsEklund

Line: 1 to 1
 
META TOPICPARENT name="MCMD"

Measurement of capacitance between strip and GND plane

Line: 12 to 12
  CsG vs bias voltage w14
Added:
>
>
Series resistance versus bias voltage

Rs vs. voltage

 Capacitive coupling between bias rail and GND plane versus time

Cs vs time

Added:
>
>
Series resistance versus time

Rs vs time

 Summary plot of all measured sensors on w14 and all measured frequencies

Cs for all sensors and all frequencies

Changed:
<
<
Table with calculated strip to GND plane capacitance for w14 at 10 kHz
GND plane type
# strip covered
Cs/strip
Rs/strip
Solid 129 1.85 pF
Mesh 50%/30um
128.5 1.30 pF
Mesh 50%/80um 126 1.5 pF
Mesh 25%/30um 126.5 0.76 pF
>
>
Table with calculated strip to GND plane capacitance for w14 at 10 kHz
GND plane type
# strip covered
Cs total
Cs/strip
Rs total
Rs/strip
Solid 129 237.8 pF
1.84 pF 17 kOhm
2.2MOhm
Mesh 50%/30um
128.5 166.8 pF
1.30 pF
18 kOhm
2.4 MOhm
Mesh 50%/80um 126 144 pF
1.14 pF
19 kOhm
2.5 MOhm
Mesh 25%/30um 126.5 95.5 pF
0.76 pF
19 kOhm 2.6 MOhm
 

Results for w09, 12 um BCB under the GND plane

Added:
>
>
Capacitive coupling between bias rail and GND plane versus bias voltage

CsG vs bias voltage w09

Series resistance versus bias voltage

Rs vs. voltage

Capacitive coupling between bias rail and GND plane versus time

Cs vs time

Series resistance versus time

Rs vs time

Summary plot of all measured sensors on w14 and all measured frequencies

Cs for all sensors and all frequencies

Table with calculated strip to GND plane capacitance for w09 at 10 kHz

GND plane type
# strip covered
Cs total
Cs/strip
Rs total
Rs/strip
Solid 129133.5 pF
1.03 pF19 kOhm
2.5 MOhm
Mesh 50%/30um
128.5 105.2 pF
0.82pF
22 kOhm
2.9 Mohm
Mesh 50%/80um 126 85.1 pF
0.68pF
21 kOhm
2.8 MOhm
Mesh 25%/30um 126.5 60.9 pF
0.48 pF
24 kOhm
3.1 Mohm
 -- LarsEklund - 02 Apr 2009
Changed:
<
<
META FILEATTACHMENT attachment="w14CsG10kHzUp.gif" attr="" comment="" date="1238658459" name="w14CsG10kHzUp.gif" path="w14CsG10kHzUp.gif" size="10074" stream="w14CsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp24822" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w14CsG10kHzHold.gif" attr="" comment="" date="1238658469" name="w14CsG10kHzHold.gif" path="w14CsG10kHzHold.gif" size="8495" stream="w14CsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp24750" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w14CsGvsFreq.gif" attr="" comment="" date="1238658476" name="w14CsGvsFreq.gif" path="w14CsGvsFreq.gif" size="10129" stream="w14CsGvsFreq.gif" tmpFilename="/usr/tmp/CGItemp24766" user="LarsEklund" version="1"
>
>
META FILEATTACHMENT attachment="w14CsG10kHzUp.gif" attr="" comment="" date="1239203887" name="w14CsG10kHzUp.gif" path="w14CsG10kHzUp.gif" size="10101" stream="w14CsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp20329" user="LarsEklund" version="2"
META FILEATTACHMENT attachment="w14CsG10kHzHold.gif" attr="" comment="" date="1239203864" name="w14CsG10kHzHold.gif" path="w14CsG10kHzHold.gif" size="8514" stream="w14CsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp20462" user="LarsEklund" version="2"
META FILEATTACHMENT attachment="w14CsGvsFreq.gif" attr="" comment="" date="1239203905" name="w14CsGvsFreq.gif" path="w14CsGvsFreq.gif" size="10095" stream="w14CsGvsFreq.gif" tmpFilename="/usr/tmp/CGItemp20422" user="LarsEklund" version="2"
META FILEATTACHMENT attachment="w14RsG10kHzHold.gif" attr="" comment="" date="1239203934" name="w14RsG10kHzHold.gif" path="w14RsG10kHzHold.gif" size="9701" stream="w14RsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp16992" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w14RsG10kHzUp.gif" attr="" comment="" date="1239203949" name="w14RsG10kHzUp.gif" path="w14RsG10kHzUp.gif" size="12843" stream="w14RsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp16982" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w09CsG10kHzHold.gif" attr="" comment="" date="1239203962" name="w09CsG10kHzHold.gif" path="w09CsG10kHzHold.gif" size="7754" stream="w09CsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp16942" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w09CsG10kHzUp.gif" attr="" comment="" date="1239203971" name="w09CsG10kHzUp.gif" path="w09CsG10kHzUp.gif" size="8690" stream="w09CsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp17077" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w09CsGvsFreq.gif" attr="" comment="" date="1239203990" name="w09CsGvsFreq.gif" path="w09CsGvsFreq.gif" size="8129" stream="w09CsGvsFreq.gif" tmpFilename="/usr/tmp/CGItemp16916" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w09RsG10kHzHold.gif" attr="" comment="" date="1239204004" name="w09RsG10kHzHold.gif" path="w09RsG10kHzHold.gif" size="8363" stream="w09RsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp16921" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w09RsG10kHzUp.gif" attr="" comment="" date="1239204013" name="w09RsG10kHzUp.gif" path="w09RsG10kHzUp.gif" size="10116" stream="w09RsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp16882" user="LarsEklund" version="1"

Revision 32009-04-06 - LarsEklund

Line: 1 to 1
 
META TOPICPARENT name="MCMD"

Measurement of capacitance between strip and GND plane

Line: 20 to 20
  Cs for all sensors and all frequencies
Changed:
<
<
Table with calculated strip to GND plane capacitance for w14
GND plane type
# strip covered
Cs/strip
Rs/strip
Solid 129 1.85 pF
Mesh 50%/30um
128.5 1.30 pF
Mesh 50%/80um 126 1.5 pF
Mesh 25%/30um 126.5 0.76 pF
>
>
Table with calculated strip to GND plane capacitance for w14 at 10 kHz
GND plane type
# strip covered
Cs/strip
Rs/strip
Solid 129 1.85 pF
Mesh 50%/30um
128.5 1.30 pF
Mesh 50%/80um 126 1.5 pF
Mesh 25%/30um 126.5 0.76 pF
 

Results for w09, 12 um BCB under the GND plane

-- LarsEklund - 02 Apr 2009

Revision 22009-04-06 - LarsEklund

Line: 1 to 1
 
META TOPICPARENT name="MCMD"

Measurement of capacitance between strip and GND plane

Line: 8 to 8
 The impedance between the bias rail and the ground plane was measured with an LCR meter in RsCs mode for a range of frequencies. For reasonably low frequencies, the measured Rs is all the bias resistances in parallel. And the measured Cs is all the strip to ground plane couplings in parallel. The measurements were done with the sensor biased for at least one sensor of each ground plane type.

Results for w14, 6 um BCB under the GND plane

Added:
>
>
Capacitive coupling between bias rail and GND plane versus bias voltage
  CsG vs bias voltage w14
Added:
>
>
Capacitive coupling between bias rail and GND plane versus time

Cs vs time

Summary plot of all measured sensors on w14 and all measured frequencies

Cs for all sensors and all frequencies

Table with calculated strip to GND plane capacitance for w14

GND plane type
# strip covered
Cs/strip
Rs/strip
Solid 129 1.85 pF
Mesh 50%/30um
128.5 1.30 pF
Mesh 50%/80um 126 1.5 pF
Mesh 25%/30um 126.5 0.76 pF

Results for w09, 12 um BCB under the GND plane

 -- LarsEklund - 02 Apr 2009

META FILEATTACHMENT attachment="w14CsG10kHzUp.gif" attr="" comment="" date="1238658459" name="w14CsG10kHzUp.gif" path="w14CsG10kHzUp.gif" size="10074" stream="w14CsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp24822" user="LarsEklund" version="1"

Revision 12009-04-02 - LarsEklund

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="MCMD"

Measurement of capacitance between strip and GND plane

Measurements performed by Alex Chilingarov at Lancaster University

Introduction

The impedance between the bias rail and the ground plane was measured with an LCR meter in RsCs mode for a range of frequencies. For reasonably low frequencies, the measured Rs is all the bias resistances in parallel. And the measured Cs is all the strip to ground plane couplings in parallel. The measurements were done with the sensor biased for at least one sensor of each ground plane type.

Results for w14, 6 um BCB under the GND plane

CsG vs bias voltage w14

-- LarsEklund - 02 Apr 2009

META FILEATTACHMENT attachment="w14CsG10kHzUp.gif" attr="" comment="" date="1238658459" name="w14CsG10kHzUp.gif" path="w14CsG10kHzUp.gif" size="10074" stream="w14CsG10kHzUp.gif" tmpFilename="/usr/tmp/CGItemp24822" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w14CsG10kHzHold.gif" attr="" comment="" date="1238658469" name="w14CsG10kHzHold.gif" path="w14CsG10kHzHold.gif" size="8495" stream="w14CsG10kHzHold.gif" tmpFilename="/usr/tmp/CGItemp24750" user="LarsEklund" version="1"
META FILEATTACHMENT attachment="w14CsGvsFreq.gif" attr="" comment="" date="1238658476" name="w14CsGvsFreq.gif" path="w14CsGvsFreq.gif" size="10129" stream="w14CsGvsFreq.gif" tmpFilename="/usr/tmp/CGItemp24766" user="LarsEklund" version="1"
 
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