Self-aligned quadruple patterning (SAQP) for routing layouts including multi-track jogs
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United States of America Patent
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Jun 5, 2018
Issued Date -
Dec 7, 2017
app pub date -
Jun 3, 2016
filing date -
Jun 3, 2016
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Abstract
An interconnect structure having a pitch of less than 40 nanometers and a self-aligned quadruple patterning process for forming the interconnect structure includes three types of lines: a β line defined by a patterned bottom mandrel formed in the self-aligned quadruple patterning process; a γ line defined by location underneath a top mandrel formed in the self-aligned quadruple patterning process; and an α line defined by elimination located underneath neither the top mandrel or the bottom mandrel formed in the self-aligned quadruple patterning process. The interconnect structure further includes multi-track jogs selected from a group consisting of a βγβ jog; a βαβ jog; an αβγ jog; a γβα jog, and combinations thereof. The first and third positions refer to the uncut line and the second position refers to the cut line in the self-aligned quadruple patterning process.
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