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30 The PCB Magazine • May 2016 Material Handling—LPI to LPI Imaging To reduce rejection due to mishandling, a new transportation system and automatic load- ing/unloading system was implemented on ev- ery conveyorized process. LPI Developing, Baking and Cleaning The previous process layout and equipment required six points of manual handling after ex- posure. In addition, the boards had to be moved to various locations within the building on old carts, which also increased the opportunities for mishandling, as shown in Figure 3. Saturn rebuilt and installed equipment to dramatically improve this process. Processes 4, 5 and 6 were conveyorized in a single line, thereby eliminating much of the manual han- dling required. As can be seen in Figure 4, the new line eliminated five points of handling as well as two vectors of board movement. Additionally, the use of accumulators (#4) at the beginning Figure 2: a) Previous transportation system; b) New transportation system. Figure 3: original room layout for lPI imaging process; product movement shown with arrows. a b Case study: reduCinG defeCts Caused by exCess HandlinG and misHandlinG