Patent ID: 8863047

Claim:
A photolithography capacity planning system, comprising: a cost calculation module, calculating a production cost, an unfulfilled demand cost, and a mask cost of a photolithography manufacturing process to produce a cost information; a capacity calculation module, calculating a capacity of light sources, a capacity of shared equipments, and a capacity of specified equipments of the photolithography manufacturing process to produce a capacity information; a demand calculation module, calculating a quantity of unfulfilled demand of the photolithography manufacturing process to produce an unfulfilled demand information according to the capacity information and a quantity of predicted demand provided by a user; a data processing module, connected to the cost calculation module, the capacity calculation module, and the demand calculation module, producing a planning result to the user according to the cost information, the capacity information, the unfulfilled demand information, and the user's planning targets to enable the user to determine whether or not to produce more masks or increase equipments, wherein a minimum of the production cost, the mask cost, and the unfulfilled demand cost is calculated and expressed in the equation below: Min ⁡ ( CO + ρ ) = ∑ i ∈ E ⁢ ⁢ ∑ p ∈ P ⁢ ⁢ ∑ j ∈ F i ⁢ ⁢ ∑ k ∈ K ⁢ ⁢ ∑ n ∈ Q ⁢ ⁢ ∑ m ∈ Q ⁢ ⁢ CM i ⁢ y ipkbjnm + ∑ i ∈ E ⁢ ⁢ ∑ p ∈ P ⁢ ⁢ ∑ j ∈ F i ⁢ ⁢ ∑ k ∈ K ⁢ ⁢ ∑ n ∈ Q ⁢ ⁢ ∑ m ∈ Q ⁢ CM i ⁢ x ipkbjnm + ∑ i ∈ E ⋃ N ⁢ ⁢ ∑ j ∈ F i ⁢ ⁢ ∑ m ∈ Q ⁢ ⁢ ∑ k ∈ K ⁢ ⁢ ∑ p ∈ P ⁢ ⁢ ∑ t ⁢ ⁢ CP ijm ⁢ q ijmkbpt + ∑ i ∈ E ⋃ N ⁢ ⁢ ∑ t ⁢ ⁢ CU i ⁢ u it wherein CO is the production cost and the mask cost, ρ is the unfulfilled demand cost, CM i is the mask cost of producing product i, x ipkbjnm is binary variables representing whether or not a product i in product group p using manufacturing process k and back-end manufacturing process b is produced in wafer plant j using equipment with m magnification ratio and mask with n magnification ratio, y ipkbjnm is binary variables representing whether or not an existing demanded product i in product group p using manufacturing process k and back-end manufacturing process b is produced in wafer plant j using equipment with m magnification ratio and mask with n magnification ratio, CP ijm is the production cost of wafer plant j producing product i using mask with m magnification ratio, CU i is an unit cost of unfulfilled demanded product i, q ijmkbpt is product i in product group p using manufacturing process k and back-end manufacturing process b produced in wafer plant j using equipment with m magnification ratio and mask with n magnification ratio in period t, u it is unfulfilled demanded product i in period t, and labels in upper case represent the whole set of corresponded labels in lower case.