公开(公告)号：GB2583299A

公开(公告)日：2020-10-21

申请号：GB202010141

申请日：2018-12-19

Applicant: IBM

Inventor： YULONG LI ,  PAUL MICHAEL SOLOMON ,  SIYURANGA O KOSWATTA

IPC: H01L27/098

Abstract: Embodiments of the invention are directed to a method and resulting structures for a semiconductor device having a controllable resistance. An example method for forming a semiconductor device includes forming a source terminal and a drain terminal of a field effect transistor (FET) on a substrate. The source terminal and the drain terminal are formed on either sides of a channel region. An energy barrier is formed adjacent to the source terminal and the channel region. A conductive gate is formed over the channel region.

公开(公告)号：GB2583299B

公开(公告)日：2022-05-04

申请号：GB202010141

申请日：2018-12-19

Applicant: IBM

Inventor： YULONG LI ,  PAUL MICHAEL SOLOMON ,  SIYURANGA O KOSWATTA

IPC: H01L27/098

Abstract: A method and resulting structures for a semiconductor device includes forming a source terminal of a semiconductor fin on a substrate. An energy barrier is formed on a surface of the source terminal. A channel is formed on a surface of the energy barrier, and a drain terminal is formed on a surface of the channel. The drain terminal and the channel are recessed on either sides of the channel, and the energy barrier is etched in recesses formed by the recessing. The source terminal is recessed using timed etching to remove a portion of the source terminal in the recesses formed by etching the energy barrier. A first bottom spacer is formed on a surface of the source terminal and a sidewall of the semiconductor fin, and a gate stack is formed on the surface of the first bottom spacer.

公开(公告)号：GB2582088B

公开(公告)日：2022-07-27

申请号：GB202007432

申请日：2018-11-22

Applicant: IBM

Inventor： YULONG LI ,  SIYURANGA O KOSWATTA ,  PAUL MICHAEL SOLOMON

IPC: G06N3/08 ,  G06N3/063

Abstract: Technical solutions are described for storing weight in a crosspoint device of a resistive processing unit (RPU) array. An example system includes a crosspoint array, wherein each array node represents a connection between neurons of the neural network, and wherein each node stores a weight assigned to the node. The crosspoint array includes a crosspoint device at each node. The crosspoint device includes a counter that has multiple single bit counters, and states of the counters represent the weight to be stored at the crosspoint device. Further, the crosspoint device includes a resistor device that has multiple resistive circuits, and each resistive circuit is associated with a respective counter from the counters. The resistive circuits are activated or deactivated according to a state of the associated counter, and an electrical conductance of the resistor device is adjusted based at least in part on the resistive circuits that are activated.

公开(公告)号：GB2582088A

公开(公告)日：2020-09-09

申请号：GB202007432

申请日：2018-11-22

Applicant: IBM

Inventor： YULONG LI ,  SIYURANGA O KOSWATTA ,  PAUL MICHAEL SOLOMON

IPC: G06N3/08 ,  G06N3/063

Abstract: Technical solutions are described for storing weight in a crosspoint device of a resistive processing unit (RPU) array. An example method includes setting a state of each single bit counter from a set of single bit counters in the crosspoint device, the states of the single bit counters representing the weight to be stored at the crosspoint device. The method further includes adjusting electrical conductance of a resistor device of the crosspoint device. The resistor device includes a set of resistive circuits, each resistive circuit associated with a respective single bit counter from the set of single bit counters, the electrical conductance adjusted by activating or deactivating each resistive circuit according to a state of the associated single bit counter.