US 2003/0198074 A1 · Mask ROM

Abstract

The mask ROM of the present is comprises by a plurality of word lines arranged in a grid, a plurality of memory units arranged between the word lines, each memory unit having a drain corresponding, a plurality of first bit lines arranged in parallel and extending in a direction diagonal to the word lines and above the drains, a plurality of second bit lines arranged in parallel and extending in a direction diagonal to the word lines and above the drains, a plurality of first nodes alternately arranged on the first bit lines, a plurality of second nodes alternately arranged on the second bit lines and the second nodes and the first nodes are arranged alternately; a plurality of third bit lines joined to the first bit lines, and a plurality of forth bit lines joined to the second bit lines.

Claims7

Dependent claims

A mask ROM, comprising:

a plurality of word lines, wherein the word lines are arranged in a grid;
a plurality of memory units arranged between the word lines, each memory unit having a drain corresponding;
a plurality of first bit lines arranged in parallel and extending in a direction diagonal to the word lines and above the drains;
a plurality of second bit lines, arranged in parallel and extending in a direction diagonal to the word lines, and above the drains;
a plurality of first nodes, alternately arranged on the first bit lines;
a plurality of second nodes, alternately arranged on the second bit lines, wherein the second nodes and the first nodes are arranged alternately;
a plurality of third bit lines joined to the first bit lines;
and
a plurality of forth bit lines joined to the second bit lines.

6 more elements

Dependencies are inferred from the claim text.

Mask ROM

Life of this patent

Mask ROM

Life of this patent

Abstract

Claims7