|Positive photoresists develop at the exposed areas, while the unexposed resist remains on the substrate after development. MicroChemicals® supplies positive resists suited for almost all lithographic applications such as dry etching, wet etching, electroplating, metallization with a lateral resolution starting from 350 nm on, and a resist film thickness range from few 100 nm towards 100 μm and more: The 1500-series of "thin" resists with improved adhesion (AZ® 1505, 1512HS, 1514H and 1518), the 6600-series with its improved thermal stability (AZ® 6612, 6624 and 6632), the high-resolution AZ® 701MiR and ECI 3027, and the thick resists AZ® 4562 and AZ® 9260.
Negative photoresists behave opposite: The areas exposed crosslink during a subsequent baking step (post exposure bake, PEB) and remain after development. With the aqueous developable and organic removable AZ® nLOF 2000 family of negative resists, MicroChemicals® covers a thickness range from 1 .. 20 μm (AZ® nLOF 2020, 2035, and 2070.
Image reversal resists can either be processed positive or negative. If the latter is required, an image reversal bake followed by a flood exposure makes the areas exposed in the first step inert in developer. MicroChemicals® supplies image reversal resists such as AZ® 5214E, TI 35ES, and TI xLift for a resist thickness range from approx. 1 to 20 micron.Beside original sales volumes, MicroChemicals® also supplies small (250 ml, 500 ml, 1.000 ml) sales volumes of all resists mentioned above with short lead times.|