A method for fabricating Ag coated beam splitter is reported. This is showing specific patterned transmittance by
immersing glass substrates in the mixture of H<sub>2</sub>SO<sub>4</sub> and H<sub>2</sub>O<sub>2</sub> to make negatively charged oxygen sites at silica surface
and then in ethanolic solutions of AgNO<sub>3</sub> and butylamine. We controlled the soaking time and molar ratios of the
mixture of AgNO<sub>3</sub> and butylamine to pattern % transmittance of electroless coated glass surface. Finally, we made a
functionalized beam splitters showing step function like transmittance and applied this to make multiple laser beams for
display and laser machining.