Reflective liquid-crystal display apparatus and manufacturing method thereof

A method for manufacturing a reflective liquid-crystal display apparatus, the method comprising:

• forming, over a substrate where a circuit element is formed, a first metal layer that is electrically connected to the circuit element;
• forming, over the first metal layer, a first insulating layer having a first opening;
• forming a metal portion filled in the first opening, by forming a metal film over the first insulating layer and planarizing the metal film until the first insulating layer is exposed;
• forming a second insulating layer over the first insulating layer;
• forming over the second insulating layer a second metal layer having a second opening;
• forming a third insulating layer over the second metal layer;
• forming, in the first insulating layer, the second insulating layer, and the third insulating layer, a through-hole that passes through the second opening and exposes an upper face of the first metal layer;
• forming a first plug filled in the through-hole;
• and
• forming a reflective electrode connected to the first plug.

A reflective liquid-crystal display apparatus, comprising:

• a first metal layer arranged over a substrate where a circuit element is formed, the first metal layer being electrically connected to the circuit element;
• a first insulating layer arranged over the first metal layer, a metal portion and a first plug being in openings of the first insulating layer, and contacting the first metal layer;
• a second insulating layer arranged over the first insulating layer;
• a second metal layer arranged over the second insulating layer, and having an opening;
• a third insulating layer arranged over the second metal layer;
• a second plug that passes through the opening of the second metal layer, and is filled in openings of the second insulating layer and the third insulating layer so as to connect to the first plug;
• and
• a reflective electrode connected to the second plug,
• wherein the height of an upper face of the metal portion is the same as the height of an upper face of the first plug.