An assembly scheduler for TFT LCD manufacturing

Capacity planning in thin film transistor – Liquid crystal display cell process

“…Chang et al [1] designed a customized machine setup decision support system (DSS) for setting the appropriate setup time for all machines in TFT-LCD cell back-end processes. Jeong et al [20] optimized both mean flow time and production progressiveness by developing a scheduler for generating shift-based capacity at each production step in TFT-LCD cell processes. Shin and Leon [33] developed a scheduling methodology for optimizing total tardiness and the number of families' set-up in TFT-LCD module processes.…”

“…The first three steps (coating, rubbing, seal printing for CF substrate line, and spacer dispensing for array substrate line) belong to the first stage. Jeong et al [20] stated that the main problem at this stage is the unmatched color filter and array substrate, which is before the attaching step where only a matched pair is allowed. The reduction of the unmatched reduces the occurrence of starvation in the attaching step and mean flow time.…”

“…However, the general conclusion on order release rules is that no rule performs consistently better than all other rules under a variety of shop configurations, operating conditions, and performance objectives [15]. It is very challenging because the assignment of the release priorities of all orders, based on some combinations of job characteristics and common system parameters, is categorized as an NP-hard problem [20,40]. Genetic Algorithm (GA) is one of the common meta-heuristic tools for solving these complex optimization problems [7,12,17].…”

Simulation and scheduling implementation study of TFT-LCD Cell plants using Drum–Buffer–Rope system

“…Little previous research works are found on the problem of scheduling TFT-LCD Cell process. Jeong, Kim, and Lee (2001) proposed scheduling procedures to disaggregate the daily production plan into shift production schedule for a Cell plant. Their scheduling objective is to minimize the mean flow time and maximize the production progressiveness.…”

An exploratory study of virtual cell design for thin-film transistor–liquid crystal display (TFT-LCD) array manufacturing

“…Finally, a FPD module undergoes a final inspection and packaging (I/P) process before it is shipped to the customer. For a concise presentation, readers are referred to [7,8] for a detailed discussion of the TFT-LCD manufacturing process.…”