Types of ICs

These are the types of the IC(intergated circuit). but ASIC (application specifice integrated circuit) is the main IC which is used now a days. asic is implemented according to the application .This ASIC is many have 3 types as
1> programmable ic - that is the ic which is implemented in a particular pattern. it can be programmed before or after the implementation depands upon the type of ic. This types of ic is mainly used in memory .
2>semi custom ic -this is mixed type of the ASIC and programmable IC . now a days this is comes under custom ASIC.
3>custom ic - custom ic are used now a days. 70% of the IC are ASIC now a days. In ASIC ,standard cell and custom both styles are used but standard cell ic are used because that have easy layouting and decrease time to market.