Appendix A: Pad Detector Specifications, Physical and Electrical
Physical Specifications:
- Detector Type: PIN, AC-coupled, single-sided, double metal
- Substrate: N-type, > 6kOhm/cm bulk resistivity
- Number of Readout Pads: 252
- Number of Guard Rings: 2
- Diced Detector Outline Dimensions:
- Width, outer edge: 64mm (± 50µm)
- Width, inner edge: 26mm (± 50µm)
- Height: 70mm (± 50µm)
- Detector Thickness: 300µm (± 15µm)
- Pad Dimensions:
- minimum pad area: 2x2mm nominal
- maximum pad area: 4.5x4.5mm nominal
- Bond Pads: two at one end, 80 x 200µm each
- Bias Resistor Type: polysilicon
- Metalization Thickness: 0.8µm ± 0.1
- Passivation Layer: silicon dioxide, 0.5µm nominal thickness
Electrical Specifications:
Note: For long term stability and burn-in, all following specifications are
to be met after a 72 hour biased burn-in period at room temperature and at below
50% humidity. All measurements are then performed at 21 (±3) deg. C.
- Max. Number of Bad Channels/Detector: 3
- Depletion Voltage (Vdep): <35V
- Interpad Resistance: >100MOhm at Vdep and delta V = 100mV
- Coupling Capacitance: >300pF
- Coupling Capacitor Breakdown Voltage: >70V with leakage current <1nA
- Pad Reverse Bias Breakdown Voltage: >70V with leakage current <100nA per pad
- Bias Resistance: 5 - 15MOhms
- Leakage Current per Pad: <10nA/pad at Vdep + 15 V
- Total pad Leakage Current per Detector: <1.5uA at Vdep + 15V
- Inner Guard Ring Leakage Current: <50 uA at Vdep + 15V