Slot-type spray nozzle, coating device, and manufacturing method of film-coated member

A slot-type spray nozzle comprising:

• a plurality of coating fluid discharge ports arranged in one direction;
• and
• a pair of air discharge ports continuously or intermittently opened in a vicinity of the coating fluid discharge ports in a width direction, the width direction being the one direction, the air discharge ports being arranged to sandwich the coating fluid discharge ports, the air discharge ports being formed such that air discharged from the air discharge ports obliquely intersects with a discharge direction of coating fluid,
• wherein the slot-type spray nozzle further includes a pair of fluid holding surfaces extending in the discharging direction of the coating fluid from sides forming both ends in the width direction of the coating fluid discharge ports, the fluid holding surfaces facing each other across the coating fluid discharge ports, and
• with a length of the fluid holding surfaces in the discharge direction of the coating fluid denoted by H1 (μm), an angle (acute angle) formed by a discharge direction of the air discharged from an air discharge port and the discharge direction of the coating fluid denoted by θ (degrees), and an interval between the coating fluid discharge ports and the air discharge port denoted by L2 (μm),
• H1≥30 μm and following Inequation (1) are satisfied:
• L
• ⁢
• 2
• /
• tan
• ⁢
• θ
• -
• 100
• ≤
• H
• ⁢
• 1
• ≤
• L
• ⁢
• 2
• /
• tan
• ⁢
• θ
• .
• (
• 1
• )