A thin film transistor array panel, according to an embodiment of the present invention, includes a first data line, a second data line neighboring the first data line, a transistor disposed in a region between the first data line and the second data line, and a pixel electrode disposed close to the second data line among the first and second data lines. In this patent several such applications, including using semiconductor nano-sized particles or semiconductor nano-sized particle containing materials as highly refractive medium in immersion lithography, as anti-reflection coating in optics, as pellicle in lithography and as sensitizer in UV photoresists are described. The liquid sprayer includes a spray liquid storage unit and a main body for supporting the spray liquid storage unit and a power supply unit. A releasably retaining member includes a retaining hole formed in a rear larger-diameter wall portion of the barrel, and a radially extending engaging peg engageable in the hole.