Design and application of CCD/EMCCD photoelectronic parameter test system
doi:10.37188/CO.EN-2023-0016
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摘要:
本文开发了一种用于测量CCD和EMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的CCD/EMCCD器件,实现CCD晶圆或封装好的成品的参数测试,实现576×288、640×512、768×576、1024×1024、1280×1024 CCD/EMCCD的测试和筛选。
Abstract:A photoelectrical parameters test system for testing CCD and electron-multiplying charge-coupled device (EMCCD) chips is designed. The test system has automatic and manual modes, and it can test the dark currents, the output amplifier’s responsivity, charge transfer efficiency, charge capacity and other parameters. According to different specifications and structures of CCD/EMCCD devices, we complete the parameter test of wafer or packaged product. The developed system can be used for the testing and sorting for 576 × 288, 640 × 512, 768 × 576, 1024 × 1024, 1280 × 1024 CCD and EMCCD chips.
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Key words:
- CCD/
- EMCCD/
- test system/
- photoelectrical parameters
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Table 1.Parameters of 16 DC channels
Channel
quantitySetting range/
VTotal relative
errorNoise,
mV/300 kHz1 −5···+10 typical: ±0.1%;
maximal: ±0.5%
fromVmax<0.15 3 0···+15 < 0.15 4 −5···+15 < 0. 20 4 0···+25 < 0.40 4 0···35 < 0.70 Table 2.Parameters of 16 AC channels
Channel quantity Setting range/ V Wave front/ ns Load (each channel) 3 HL, LL: –5...+10 120..200 up to 24 nF 4 HL: –5...+10 or 0...+15
LL: –5...+10 or 0...+15< 15 220 pF 1 HL: 0...+15
LL: 0...+15< 15 220 pF 6 HL: +5
LL: 0< 5 150 pF 1 HL: –5...+ 15;
LL, ML: –5...+10
(three level signal)120..200 up to 24 nF 1 HL: –5...+45
LL: –5...+ 45
(square or sine wave)20 100 pF Table 3.Electrical parameters of EMCCD matrices measured by the test system
No Parameter Range 1 Resistances between the pairs of
chip contact pads2 Average Dark Signal > 1 e/pixel/s 3 Dark Signal Non-uniformity (DSNU) 4 Multiplication Gain 1~1000 5 Peak Output Voltage (POV) < 1 V 6 Output Amplifier Responsivity (OAR) μV/e- 7 Register Charge Handling 8 Electric Charge Transfer Efficiency (CTE) ≤ 0.99995 Table 4.Measurements example of test system
1. POV nm, norm mode (max) = 0.177 V; 2. SC is (saturation charge) = 132151 e`/pixel; 3. POV hgm, high gain mode (max) = 1.782 V; 4. CHCgr, Charge Handling Capability of gain
register = 1280481 e`/pixel;5. White column defects = 3 6. Dark column defects quantity = 18 7. Average Dark Signal (U) = 0.002939 V/pixel/s 8. Average Dark Signal (e`) = 2396 e`/pixel/s 9. OAR (output amplifier responsivity) = 1.416 uV/e`
(NM: 1.226 uV/e`)10. Dark signal non-uniformity (DSNU) (rms) = 67.334 % 11. Charge transfer efficiency (CTE) = 99.908 % -
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