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利用中国散裂中子源反角白光中子束线开展13款商用静态随机存取存储器的中子单粒子效应实验. 研究了测试图形、特征尺寸和版图工艺差异对单粒子效应的影响. 结果表明测试图形对器件的单粒子翻转截面影响不大, 但对部分器件的多单元翻转占比有较大的影响; 特征尺寸对器件单粒子翻转截面的影响没有明显的规律, 但对多单元翻转的影响规律明显, 多单元翻转占比和最大位数都随着特征尺寸的降低而增大; 器件版图工艺差异对器件的单粒子翻转截面和多单元翻转占比都有较大的影响. 此外, 通过与高原辐照实验结果对比, 发现在反角白光中子源获得的多单元翻转占比小于高原辐照实验的结果, 其原因是反角白光中子源实验中, 中子的最高能量和高能成分占比偏小, 且中子束流只有垂直入射. 因此, 利用反角白光中子源评估器件的大气中子单粒子效应时可能会低估多单元翻转情况. 本文的结果可为研究者利用反角白光中子源开展相关研究提供参考.The experiment of neutron single event effect was carried out at China Spallation Neutron Source (CSNS) back-n on 13 kinds of commercial SRAM. The single event upset (SEU) cross section of each device was obtained, and multiple cell upsets (MCU) were extracted from the SEUs using a statistical method without layout information. The influences of the test pattern, feature size and device layout on the SEU cross section and MCU were studied. The results show that the test pattern has little influence on the SEU cross section of the devices, but has a great influence on the MCU ratio of some devices. The feature size has influence both on the SEU cross section and the MCU ratio of the devices. The influence on SEU cross section is not definite. The influence on the MCU ratio is definite. Both the ratio and the maximum size of the MCUs increase with the decrease of the feature size. The difference of layout has great influence both on the SEU cross section and the MCU ratio of the device. In addition, compared with the results of plateau irradiation, the ratio of MCU in CSNS back-n is less than that of plateau irradiation. There are two reasons for this difference. One is that the energy spectrum of CSNS back-n is softer than that of the atmospheric neutron. The other is the neutron beam at CSNS back-n is perpendicular to the device under test. Therefore, evaluating the atmospheric neutron SEE using CSNS back-n line may underestimate the MCU ratio of the device under test. The experimental data, analytical methods and results obtained in this paper are valuable for the researchers to carry out the atmospheric neutron SEE test and the evaluation of devices on atmospheric neutron SEE.
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Keywords:
- China spallation neutron source/
- neutron single event effect/
- single event upset/
- multiple cell upsets
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型号 制造商 容量/bits 特征尺寸/nm 工作电压/V HM628512A HITACHI 4 M (512 K × 8) 500 5 HM628512B HITACHI 4 M (512 K × 8) 350 3.3 HM62V8100 RENESAS 8 M (1 M × 8) 180 3.3 IS62WV1288 ISSI 1 M (128 K × 8) 130 3.3 IS64WV25616 ISSI 4 M (256 K × 16) 65 3.3 IS61WV204816 ISSI 32 M (2 M × 16) 40 3.3 CY62126V Cypress 1 M (64 K × 16) 350 3.0 CY62126BV Cypress 1 M (64 K × 16) 250 3.0 CY62126DV Cypress 1 M (64 K × 16) 130 3.0 CY7C1318AV18 Cypress 18 M (1 M × 18) 150 1.8 CY7C1318BV18 Cypress 18 M (1 M × 18) 90 1.8 CY7C1318KV18 Cypress 18 M (1 M × 18) 65 1.8 M328C 国产 256 K (32 K × 8) 65 1.8 型号 特征尺寸/nm 测试图形 容量/Mbit 注量(>10 MeV)/108n·cm–2 翻转数/# 翻转截面/10-14cm2·bit–1 不确定度/% HM628512A 500 0x00H 12 5.54 176 2.52 12.88 0x55H 12 7.21 262 2.89 12.13 0xAAH 12 5.38 215 3.18 12.47 0xFFH 12 5.36 205 3.04 12.56 HM628512B 350 0x00H 12 5.71 207 2.88 12.54 0x55H 8 7.03 197 3.34 12.64 0xAAH 12 8.97 303 2.69 11.92 0xFFH 12 3.26 114 2.78 14.03 HM62V8100 180 0x00H 24 5.31 343 2.57 11.75 0x55H 24 5.29 367 2.76 11.67 0xAAH 24 5.29 387 2.91 11.61 0xFFH 24 5.36 342 2.53 11.76 IS62WV1288 130 0x00H 1 9.52 55 5.51 17.05 0xAAH 3 8.05 116 4.58 13.97 0xFFH 3 10.20 151 4.68 13.24 IS64WV25616 65 0x00H 8 4.76 271 6.79 12.08 0x55H 8 4.76 339 8.49 11.77 0xAAH 8 5.23 381 8.68 11.63 0xFFH 8 4.50 275 7.28 12.06 IS61WV204816 40 0x00H 64 4.76 534 1.67 11.30 0x55H 64 4.76 523 1.64 11.32 0xAAH 64 4.76 589 1.84 11.22 0xFFH 64 6.35 707 1.66 11.10 CY62126V 350 0x55H 3 9.88 64 2.06 16.29 0xAAH 3 9.88 71 2.28 15.81 CY62126BV 250 0x55H 3 128.00 516 1.28 11.33 CY62126DV 130 0x00H 3 10.40 115 3.53 14.00 0x55H 3 10.60 139 4.16 13.45 0xAAH 3 10.40 141 4.30 13.41 0xFFH 3 9.04 106 3.73 14.26 CY7C1318AV18 150 0X55H 32 5.12 1293 7.52 10.80 CY7C1318BV18 90 0X55H 32 4.69 381 2.42 11.63 CY7C1318KV18 65 0X55H 32 5.09 374 2.19 11.65 M328C 65 0X55H 0.75 116 167 1.84 13.00 型号 特征尺寸/nm 不同测试图形时MCU占比 最大MCU位数 0x00 0x55H 0xAAH 0xFFH HM628512A 500 0 0 0 0 1 HM628512B 350 0 0 0 0 1 HM62V8100 180 2.33% 5.94% 1.09% 4.68% 2 IS62WV1288 130 — 0 4.65% 0 2 IS64WV25616 65 9.59% 9.14% 6.01% 0.73% 3 IS61WV204816 40 28.29% 24.09% 28.52% 25.00% 7 CY62126V 350 0 0 0 0 1 CY62126BV 250 0 0 0 0 1 CY62126DV 130 40.00% 35.97% 35.46% 45.28% 3 CY7C1318AV18 150 — 36.13% — — 4 CY7C1318BV18 90 — 42.31% — — 6 CY7C1318KV18 65 — 56.80% — — 7 M328C 65 — 14.37% — — 2 -
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