3-8 September 2017
The Open University, Milton Keynes, UK.
Europe/London timezone

Characterisation of capacitively coupled HV/HR-CMOS sensor chips for the CLIC vertex detector

8 Sep 2017, 09:20
Berrill Lecture Theatre (OU) ()

Berrill Lecture Theatre (OU)

The Open University, Walton Hall, Milton Keynes, MK7 6AA


Iraklis Kremastiotis (KIT - Karlsruhe Institute of Technology (DE))


The capacitive coupling between an active sensor and a readout ASIC has been considered in the framework of the CLIC vertex detector study. The CLICpix Capacitively Coupled Pixel Detector (C3PD) is a High-Voltage CMOS sensor chip produced in a commercial $180$ nm HV-CMOS process for this purpose. The sensor was designed to be connected to the CLICpix2 readout chip. It therefore matches the dimensions of the readout chip, featuring a matrix of $128\times128$ square pixels with $25$ $\mu$m pitch. The sensor chip has been produced with the standard value for the substrate resistivity (of $\sim20$ $\Omega$cm) and characterised in standalone testing mode, before receiving and testing capacitively coupled assemblies. The standalone measurement results show a rise time of $\sim20$ ns for a power consumption of $2.7$ $\mu$A/pixel.

Following the successful characterisation of the C3PD ASICs produced with the standard substrate resistivity a second submission took place, with higher substrate resistivity wafers ($\sim20$, $80$, $200$, and $1000$ $\Omega$cm). The higher resistivity, along with a layout modification done in order to achieve a higher breakdown voltage, are expected to have beneficial results on the sensor performance. A comparison of the performance of the sensor with different substrate resistivities will be presented.

C3PD ASIC and measured $^{55}$Fe spectrum.

Primary authors

Iraklis Kremastiotis (KIT - Karlsruhe Institute of Technology (DE)) Rafael Ballabriga Sune (CERN) Michael Campbell (CERN) Dominik Dannheim (CERN) Adrian Fiergolski (CERN) Daniel Hynds (CERN) Szymon Kulis (CERN) Ivan Peric (KIT - Karlsruhe Institute of Technology (DE))

Presentation Materials

Your browser is out of date!

If you are using Internet Explorer, please use Firefox, Chrome or Edge instead.

Otherwise, please update your browser to the latest version to use Indico without problems.