Patent ID: 9204500
Filing Date: 2015-12-01
Classification: H05B

Abstract:
1. A microwave heating apparatus comprising: a processing chamber configured to accommodate a target object to be processed, the processing chamber having therein a microwave irradiation space; and a microwave introducing unit including four microwave sources that generate microwaves for heating the target object, wherein the processing chamber includes a top wall, a bottom wall, and four sidewalls connected to one another; the top wall has four microwave introduction ports; through each of the four microwave introduction ports the microwaves generated by a corresponding microwave source of the four microwave sources are introduced into the processing chamber; each of the four microwave introduction ports is of a substantially rectangular shape having long sides and short sides in a plan view; the four microwave introduction ports are arranged in such a way that the long sides and the short sides thereof are parallel to inner surfaces of the four sidewalls; the four microwave introduction ports are circumferentially disposed at positions spaced apart from each other by angles of about 90°; each one of the four microwave introduction ports has, from among the four microwave introduction ports, a corresponding microwave introduction port whose long sides are parallel to the long sides of said one of the four microwave introduction ports; and said one of the four microwave introduction ports is spaced apart from its corresponding microwave introduction port in a longitudinal direction that is parallel to the long sides of said one of the four microwave introduction ports, so as to not overlap any portion of its corresponding microwave introduction port in said longitudinal direction.