Micro patch coating device and method

摘要

A micro patch coating device (100) includes at least one micro channel (12) containing two-phase fluid (11) therein. A driving mechanism (13) is arranged to drive the micro channel (12) and a substrate (6) to move in a movement relative to each other and a fluid driving mechanism (16) is arranged to drive the two-phase fluid (11) out of an outlet (122) of the micro channel (12), such that the two-phase fluid (11) is coated on the substrate (6) and thereby micro patches (7a) are formed on the substrate (6). The two-phase fluid (11) is composed of a coating fluid (2a) alternatively intercepted by a plurality of auxiliary fluid segments (3). Alternatively, the micro channel is replaced by a coating die (2) provided with at least one coating fluid inlet (21a), at least one auxiliary fluid inlet (22), and a micro channel structure (4) therein. A coating fluid (2a) is supplied through the coating fluid inlet (21a) and an auxiliary fluid (3) is alternatively supplied through the auxiliary fluid inlet (22). A two-phase fluid composed of a coating fluid alternatively intercepted by a plurality of auxiliary fluid segments is generated in the micro channel structure (4).