A positive resist composition comprises: a resin capable of decomposing by the action of an acid to increase the solubility in an alkali developer; and a compound capable of generating an acid upon irradiation with one of an actinic ray and a radiation, wherein the resin contains a specified repeating unit. The current regime applied to the plating bath can include time intervals of direct current and of pulsed current in order to selectively control the deposition of tin by activation or diffusion control. This encoded pseudo-noise code is then used to spread an information signal by modulating the information signal with the encoded pseudo-noise code. A drive circuit for one of the SCR legs is provided such that the SCR may be continuously driven on for either a high energy biphasic defibrillation pulse or a low energy pacing pulse.