HD MicroSystems™ produces solvent based, ancillary products for its line of negative tone photosensitive polyimides. This includes the HD-4100 Series products. Typical use is a 20:1 ratio of developer to polyimide (for example, a 250g bottle of HD-4100 will require about one gallon of developer). Requirements for rinse are about a 10:1 ratio.
All ancillary products are filtered to 0.2µm and tested for metal impurities, typically well below 500ppb.
Based on gamma butyrolactone (BLO) this developer is more aggressive to develop faster but may not exhibit the process latitude of the PA-401D.
The standard developer for the HD-4000 Series products. Based on cyclopentanone (CPO) it offers an evenly controlled develop rate and can be used as an edge bead remover, as well.
The preferred rinse is based on PGMEA.