Patent ID: 11961851
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H  G | IPC B  G  H

Claim 3:
4. A manufacturing method of a display apparatus, the method comprising:
forming an amorphous silicon thin film on a substrate;
crystallizing the amorphous silicon thin film into a polycrystalline silicon thin film by irradiating a laser beam onto the amorphous silicon thin film using a laser apparatus; and
forming an insulating layer,
wherein the laser apparatus comprises:
a laser generator configured to generate a first laser beam proceeding along a first direction;
an inversion module configured to convert the first laser beam to a second laser beam proceeding along the first direction, the inversion module comprising:
a splitter configured to form a reflected laser beam by partially reflecting the first laser beam, and a transmitted laser beam by partially transmitting the first laser beam; and
a prism configured to reflect the reflected laser beam,

a first path converter that is configured to receive the second laser beam emitted from the inversion module, and to emit a third laser beam traveling in a third direction that is perpendicular to the first direction; and
a second path converter that is configured to receive the third laser beam, and to emit a fourth laser beam traveling in a direction that is opposite to the first direction.