TFT Gantry Dual Laser Titler
For manufacturing efficiency, flat display panels are manufactured in a big glass panel form. The glass is later cut into smaller, actual usable panels for use in LCD TV, mobile phone display, PDA etc.
Material tracking data markings are needed on specific location of the Flat Panel Display with chrome coating on it. This is done mainly at the beginning of the manufacturing process, on a big piece of uncut TFT glass panel. Those data marks are marked onto every individual subpanel.
In most cases, marking specs allows a maximum of 15 um positioning tolerance. ScanVisionTM solution is very beneficial to this system. An XY gantry transports the dual ScanVisionTM lasers to mark the subpanels section by section. With the built-in, high accuracy vision compensation, all marks on the subpanels can be done within the required tolerance, without needing a highly precise mechanical positioning system. As the marking is using 2D codes, the image each mark is then captured by the same camera and decoded for a good mark.
The biggest panel size machine incorporating this technology is a Generation 6 (G6) panel of size 1500mm x 1850mm. These panels are transported by high speed conveyor system where the stopping position can deviate in the range of millimeters. However as long as the fiducial mark is within the camera field of view this is not a problem. Furthermore even if it falls outside sometimes, a rapid searching pattern can be done to find the fiducial since the galvo mirrors can move so fast. As a fiducial registration is done just before every mark and the time between the 2 can be below 100 ms the chances of the workpiece drifting during that interval is quite negligible.
ADVANCED MARKING MACHINE
·In-line handler
·Vision positioning
·Marking inspection
·Adjustable conveyer for various models
·Multi-position and orientation marking
·User friendly sofware under XP system
tft glass marking system
·TFT color filter Data Matrix code marking
·Spot size about 40~50um with 110x110 area
