| 摘要 |
PURPOSE: An image sensor and a manufacturing method thereof are provided to get an ohmic contact between a wiring and an image sensing unit by decreasing a dishing phenomenon between a contact plug of the wiring and an image sensing unit. CONSTITUTION: A readout circuit is formed in a first substrate(100). A wiring(150) is electrically connected to the readout circuit. A contact plug(170) comprises an insulating layer and is formed on the wiring. An image sensing unit(210) is formed on the contact plug.
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