Charge Collection Control Using Retrograde Well Tested by Proton Microprobe Irradiation
- 1 December 1993
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 32 (12S)
- https://doi.org/10.1143/jjap.32.6287
Abstract
Soft error reduction by high-energy ion-implanted layers has been investigated by novel evaluation techniques using high-energy proton microprobes. A retrograde well formed by 160 and 700 keV boron ion implantation could completely suppress soft errors induced by the proton microprobes at 400 keV. The proton-induced current revealed the charge collection efficiency for the retrograde well structure. The collected charge for the retrograde well in the soft-error mapping was proved to be lower than the critical charge of the measured DRAMs (dynamic random-access memories). Complementary use of soft-etror mapping and ion-induced-current measurement could clarify well structures immune against soft errors.Keywords
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