Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head

A method for recovering a liquid discharge head, the liquid discharge head comprising a plurality of first liquid flow paths each communicating with an associated discharge opening for discharging liquid, a plurality of second liquid flow paths corresponding respectively to the first liquid flow paths, each of the second liquid flow paths having a bubble-generating region in which bubbles are generated in the liquid by heating the liquid, a movable member located between the first liquid flow path and the bubble-generating region, having a free end on the side of the discharge opening, the free end moving toward the first liquid flow path by pressure exerted by bubbles generated in the bubble-generating region to direct the pressure toward the discharge opening, and wherein a first supply path for supplying the liquid to a first liquid chamber communicating in common with the plurality of first liquid flow paths communicates with the first liquid chamber through a plurality of first supply ports, and wherein a second supply path for supplying the liquid to a second liquid chamber commonly communicating with the second liquid flow paths communicates with the second liquid chamber through a plurality of second supply ports, wherein the device substrate is provided in plural, wherein the first supply path has a pipe shape and is provided over the plurality of the device substrates, wherein the liquid to be discharged is supplied to the first liquid flow paths of each of the device substrates through the first supply path, wherein the second supply path has a pipe shape and is provided over the plurality of device substrates, and wherein the liquid to be discharged is supplied to the second liquid flow paths of each of the device substrates through the second supply path, comprising the steps of:

• supplying a liquid to said second supply path while both ends of said first supply path are closed;
• applying pressure to said second supply path from both sides thereof while both of said ends of said first supply path are closed;
• supplying a liquid to said first supply path while both ends of said second supply path are closed;
• and
• applying pressure to said first supply path from both sides thereof while both of said ends of said second supply path are closed, whereby recoveries for said first supply path and said second supply path are performed.