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1TnC memory bit-cell having stacked and folded planar capacitors with lateral offset

專利號(hào)
US11997853B1
公開日期
2024-05-28
申請(qǐng)人
Kepler Computing Inc.(US CA San Francisco)
發(fā)明人
Rajeev Kumar Dokania; Amrita Mathuriya; Debo Olaosebikan; Tanay Gosavi; Noriyuki Sato; Sasikanth Manipatruni
IPC分類
H10B53/30
技術(shù)領(lǐng)域
capacitors,capacitor,bit,in,electrode,node,layer,some,memory,wherein
地域: CA CA San Francisco

摘要

A configuration for efficiently placing a group of capacitors with one terminal connected to a common node is described. The capacitors are stacked and folded along the common node. In a stack and fold configuration, devices are stacked vertically (directly or with a horizontal offset) with one terminal of the devices being shared to a common node, and further the capacitors are placed along both sides of the common node. The common node is a point of fold. In one example, the devices are capacitors. N number of capacitors can be divided in L number of stack layers such that there are N/L capacitors in each stacked layer. The N/L capacitors are shorted together with an electrode (e.g., bottom electrode). The electrode can be metal, a conducting oxide, or a combination of a conducting oxide and a barrier material. The capacitors can be planar, non-planar or replaced by memory elements.

說(shuō)明書

FIG. 9A illustrates an apparatus comprising memory and corresponding logic, wherein the memory comprises FE memory bit-cells, where an individual memory bit-cell includes 1TnC bit-cells with PLs parallel to a BL, and with individual switches coupled to the capacitors on the plate-line side, where the corresponding logic is to apply word-line boosting, and wherein the capacitors are in a stacked and folded configuration, in accordance with some embodiments.

FIG. 9B illustrates an FE memory with word-line repeaters, wherein memory arrays include FE memory 1TnC bit-cells of FIG. 9A, in accordance with some embodiments.

FIG. 9C illustrates a timing diagram for write operation for 1T1C bit-cells with the PL parallel to the BL and where the word-lines (WLPs) for switch transistors for multiple plate-lines within a bit-cell are driven by a same signal, in accordance with some embodiments.

FIG. 9D illustrates a timing diagram for write operation for 1T1C bit-cells with the PL parallel to the BL and where the word-lines (WLPs) for switch transistors for multiple plate-lines within a bit-cell are driven by different signals, in accordance with some embodiments.

FIG. 9E illustrates a timing diagram for read operation for 1T1C bit-cells with the PL parallel to the BL and where the word-lines (WLPs) for switch transistors for multiple plate-lines within a bit-cell are driven by a same signal, in accordance with some embodiments.

權(quán)利要求

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