US 12,319,059 B2
Liquid discharge head, liquid discharge device, liquid discharge apparatus
Satoshi Mizukami, Kanagawa (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Ricoh Company, Ltd., Tokyo (JP)
Filed on Jun. 12, 2020, as Appl. No. 16/900,255.
Claims priority of application No. 2019-114739 (JP), filed on Jun. 20, 2019.
Prior Publication US 2020/0398569 A1, Dec. 24, 2020
Int. Cl. B41J 2/14 (2006.01); C23C 16/40 (2006.01); C23C 16/455 (2006.01)
CPC B41J 2/14201 (2013.01) [C23C 16/402 (2013.01); C23C 16/405 (2013.01); C23C 16/45525 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
a flow path former that forms a liquid flow path, and
a surface treatment film formed on a surface of the flow path former,
wherein an amount of carbon, which is not chemically bonded to other elements, contained in the surface treatment film is 15 atomic % to 30 atomic %.