Liquid droplet ejection device and liquid droplet ejection method

A liquid droplet ejection device comprising:

• at least one first liquid droplet ejection unit including a first liquid holding unit and a first tip, the first liquid holding unit configured to hold a first liquid, and the first tip configured to eject the first liquid in the first liquid holding unit as a first liquid droplet configured to treat a surface of an object;
• at least one second liquid droplet ejection unit including a second liquid holding unit and a second tip, the second liquid holding unit configured to hold a second liquid, and the second tip configured to eject the second liquid in the second liquid holding unit as a second liquid droplet differing from the first liquid droplet configured to form a pattern on the object;
• an object holding unit configured to hold the object;
• and
• a driving unit configured to move the first tip and the second tip in a first direction relative to the object holding unit, wherein
• the first tip is arranged in the first direction relative to the second tip, and
• the second liquid droplet is more viscous than the first liquid droplet.