Patent · US Active

Semiconductor device including overlay patterns

US10573633B2 · kind B2 · utility

0Cited by
9References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 4, 2017
Grant dateFeb 25, 2020
Priority date
Expiry dateDec 4, 2037

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L2223/54426
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

A semiconductor device includes a first overlay group and a second overlay group disposed on a semiconductor substrate. The first overlay group includes first lower overlay patterns which extend in a first direction, first upper overlay patterns overlapping the first lower overlay patterns, and first via overlay patterns interposed between the first lower overlay patterns and the first upper overlay patterns. The second overlay group includes second lower overlay patterns which extend in a second direction, second upper overlay patterns overlapping the second lower overlay patterns, and second via overlay patterns interposed between the second lower overlay patterns and the second upper overlay patterns. The second lower overlay patterns include end portions adjacent to and spaced apart from the first overlay group.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.