Patent ID: 11923397
Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A micro light emitting diode display substrate manufacturing method, comprising:
a step A, manufacturing a first metal film layer on a bottom surface of an underlay substrate, forming at least one fanout circuit pattern and a side printed bonding pad, and connecting the fanout circuit pattern to the side printed bonding pad;
a step B, manufacturing a thin film transistor on a top surface of the underlay substrate;
a step C, connecting a micro light emitting diode disposed on the top surface of the underlay substrate to the thin film transistor; and
a step D, connecting the thin film transistor through a side wire disposed aside the underlay substrate to the side printed bonding pad of the first metal film layer;
wherein the step B comprises:
a step b6, forming a metal film layer, and patterning the metal film layer to at least form a drain electrode, a second source electrode/pixel electrode and a common cathode; and
a step b7, self-aligned patterning and forming a second passivation layer and a black matrix layer on the drain electrode by a common mask process such that the second passivation layer covers the drain electrode and The black matrix layer covers a surface of the second passivation layer;

wherein the step C comprises bonding the micro light emitting diode on the second source electrode/pixel electrode and the common cathode.