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SuperB SVT Silicon Sensor Requirements

SuperB SVT Silicon Sensor Requirements. Which level of detail? Details of layout and testing procedures can be fixed only after committing to a supplier In BaBar they were the subjet of specific BaBar Notes Keep separated for Layer 0 and for Layers 1-5 ?

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SuperB SVT Silicon Sensor Requirements

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  1. SuperB SVT Silicon Sensor Requirements Which level of detail? • Details of layout and testing procedures can be fixed only after committing to a supplier • In BaBar they were the subjet of specific BaBar Notes Keep separated for Layer 0 and for Layers 1-5 ? • Different thickness (and wafer size?) • Likely different suppliers • LY0 strips not oriented to read r-φ or z coordinates L. Bosisio - SuperB SVT Meeting - 21-02-2011

  2. Silicon Sensor Requirements • General requirements: • Double-sided • Substrate thickness and tolerance • Orthogonal strips on the two sides • AC coupled (integrated decoupling capacitors) • Polysilicon bias resistors, connected to a metal Bias Line and located outside of an implanted Guard Ring (to minimize dead area) • N-side strips insulated by p-stops or p-spray ? • Geometrical requirements • Electrical requirements • Radiation tolerance • Testing procedures L. Bosisio - SuperB SVT Meeting - 21-02-2011

  3. Geometrical requirements • Number of different sensor types (“Models”) • For each Model: • Overall dimensions • Dimensions of active area • Number and pitch of p-type strips • Number and pitch of n-type strips • Readout pitch on p-side • Readout pitch on n-side • Number and approx. locations of ‘AC’ bonding pads • Number and approx. locations of ‘DC’ probing pads L. Bosisio - SuperB SVT Meeting - 21-02-2011

  4. Electrical requirements Many of these specs depend on model and side • Operating voltage range • Max. Guard Ring leakage current • Max. Bias Line current per unit (active) area • Max. leakage current of a single strip • Min. strip insulation resistance • Range of polysilicon bias resistance values • Max. interstrip capacitance per unit strip length • Min. AC coupling capacitance per unit strip length • Max. metal strip resistance per unit length • Stability requirements on leakage current, strip insulation and interstrip capacitance L. Bosisio - SuperB SVT Meeting - 21-02-2011

  5. Radiation Tolerance Requirements Which kind/energy/amount of radiation should we specify? • Post-irradiation requirements (?): • Operating voltage range • Max. Guard Ring leakage current • Max. Bias Line current per unit (active) area • Max. leakage current of a single strip • Min. strip insulation resistance • Max. interstrip capacitance per unit strip length • Stability requirements on leakage current, strip insulation and interstrip capacitance L. Bosisio - SuperB SVT Meeting - 21-02-2011

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