**What is the black matrix?** The black matrix is *the black demarcation between the red, green, and blue sub-pixels.* > **What does the black matrix serve as?** > The black matrix serves as *the partition that separates the space for each sub-pixel before the color filter layer for RGB sub-pixels is generated.* > > **What three things does the black matrix prevents?** > The three things that the black matrix prevents are: > 1. The LCD backlight bleeding through. > 2. The colors from the RGB sub-pixels mixing. > 3. Leakage current of TFT from increasing due to an external light source. **What is the cross section layout of the color filter for a Liquid Crystal Display (LCD)?** The cross section layout of the color filter for an LCD is:  **What happens before the Red, Green, and Blue (RGB) color filters are created on the glass substrate of the Liquid Crystal Display (LCD)?** Before the RGB color filters are created on the glass substrate of the LCD, *the black matrix is patterned by photolithography on the glass substrate.* > **What is deposited between each array of black matrix?** > Between each array of black matrix, *RGB color filters* are deposited. > > **What is applied on top of the black matrix and Red, Green, and Blue (RGB) color filters and why?** > On top of the black matrix and RGB color filters, *an overcoat is applied in order to even out the color filter.* > > **What is deposited on top of the overcoat and why?** > On top of the overcoat, *a transparent conductive electrode called Indium Tin Oxide (ITO) is deposited in order to allow control of the liquid crystals after being bonded to the TFT substrate.*