Apparatus and method for conformal mask manufacturing

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Electron beam imaging

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C430S942000, C438S712000

Reexamination Certificate

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07993813

ABSTRACT:
A manufacturing process technology creates a pattern on a first layer using a focused ion beam process. The pattern is transferred to a second layer, which may act as a traditional etch stop layer. The pattern can be formed on the second layer without irradiation by light through a reticle and without wet chemical developing, thereby enabling conformal coverage and very fine critical feature control. Both dark field patterns and light field patterns are disclosed, which may enable reduced or minimal exposure by the focused ion beam.

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