A keyboard sled adapted to communicatively interact with a portable computer system. In a preferred embodiment, the lamp holder base has a longitudinal axis and an actuator finger coupled to and shielded within the lamp holder base. In addition, the photoresist composition has low light absorbance at the wavelength of 193 nm, 157 nm and 13 nm, and thus is suitable for a photolithography process using ultraviolet light sources such as VUV and EUV in fabricating a minute circuit for a high integration semiconductor device. The groove has a width of about 0.