1 / 6

CALICE pixel Deep P-Well results

CALICE pixel Deep P-Well results. P-well contact ground. Nwell ≈ 900 μ m 2. P-well 1 μ m ring gap. Collecting diodes 3.6 x 3.6 μ m 2. Hit points. Bias: NWell 3.5V Diodes: 1.5V. 50 μ m x 50 μ m pixel size. CALICE pixel Deep P-Well results. P-well contact ground.

leal
Download Presentation

CALICE pixel Deep P-Well results

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. CALICE pixel Deep P-Well results P-well contact ground Nwell ≈ 900μm2 P-well 1μm ring gap Collecting diodes 3.6 x 3.6 μm2 Hit points • Bias: • NWell 3.5V • Diodes: 1.5V 50 μm x 50 μm pixel size G.Villani jan. 07

  2. CALICE pixel Deep P-Well results P-well contact ground Nwell 3.6 x 3.6 μm2 P-well 1μm ring gap P-well 5μm guard ring Collecting diodes 3.6 x 3.6 μm2 1 μm clearance from the guard ring Hit point • Bias: • NWell 3.5V • Diodes: 1.5V 50 μm x 50 μm pixel size G.Villani jan. 07

  3. ≈ 9.5 μm ≈ 202 mV ≈ 144 mV CALICE pixel Deep P-Well results Deep P Well Ring ( @ z= 31 μm) Epitaxial layer potential well μm V top μm G.Villani jan. 07

  4. e- 1 6 CALICE pixel Deep P-Well simulation results Single pixel results Pwell Guard ring and CNW comparison CNW: 257 (e- ) GR: 268 (e- ) Guard Ring DPW Central NW 900 um2 Diodes Charge collected (e- ) G.Villani jan. 07 CNW Charge collected (e- ) Collection time (ns)

  5. CALICE pixel Deep P-Well results • Conclusions • The layout with central well size 900 μm2 clearly shows worse performances in terms of charge collection compared to the guard ring PW: however the worst cases seem comparable, suggesting a S/Nmin exceeding 10 in both cases • Collection time still well below 200 ns in both cases, with central NW 900 μm2 faster than the guard ring PW. • Shielding effect P Well Guard ring has to be assessed with reference to similar layouts: no NW strips WERE present in the 5 μm guard ring layout, that might affect charge collection by the diodes. • Next step: • Final layout simulation with and without 3 μm PW guard ring and proper biasing • Different size diodes simulations (7.6 / 1.8 μm) G.Villani jan. 07

  6. CALICE pixel Deep P-Well results Narrow ( 3 μm ?) P-Well guard ring around each pixel G.Villani jan. 07

More Related