1. Field of the Invention
The present invention relates to a method of manufacturing a liquid discharge head that discharges a liquid.
2. Description of the Related Art
For example, an inkjet recording method that performs recording by discharging ink onto a recording medium is used in a liquid discharge head that discharges a liquid.
As a method of manufacturing a liquid discharge head, Japanese Patent Application Laid-Open No. 2009-166492 discusses a method that uses an i-line exposure apparatus that employs a projection method. The liquid discharge head discussed in Japanese Patent Application Laid-Open No. 2009-166492 includes a substrate that has discharge energy generating elements, and a discharge port forming member that constitutes discharge ports and liquid flow paths. Manufacture thereof is performed in the following manner. First, a flow path pattern of the liquid flow paths is formed on or above the substrate using a positive-type photosensitive resin. Next, a negative-type photosensitive resin is formed as the material of the discharge port forming member on the flow path pattern. Subsequently, the negative-type photosensitive resin is exposed using i-line illumination, and the discharge ports are formed by patterning.
According to this method, discharge ports with a favorable circular shape can be obtained simply and with good reproducibility.