Liquid crystal display device and a method for manufacturing a grounding device
AssigneeSamsung Electronics Co., Ltd.
InventorSang-Chul Lee
Life of this patent
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Abstract
An LCD device in which a plurality of grounding protrusions are formed in a region not having a signal transmission pattern among the bottom surface of a printed circuit board in contact with a bottom chassis so as to increase a contact area between the printed circuit board and the bottom chassis, to thereby prevent a damage caused by an electromagnetic wave and error of devices.
Claims7
A method for manufacturing a printed circuit board (PCB), the PCB having a signal transmission pattern and a metal film formed on a bottom surface thereof, the metal film formed where a conductive fixing element is accommodated to fix the PCB to a conductive housing and electrically connected to the fixing element, the method comprising the steps of:
- forming a first mask to block a portion of the bottom surface where a the signal transmission pattern is not formed;
- forming a solder resist film on the first mask to cover the signal transmission pattern, wherein the solder resist film is not formed on the portion blocked by the first mask;
- and
- forming a grounding protrusion on the portion blocked by the first mask and not covered by the solder resist film,
- wherein the grounding protrusion has a height large enough to be electrically connected to the metal film via the conductive housing when the PCB is fixed to the conductive housing by the conductive fixing element.
Dependencies are inferred from the claim text.