SMALL-SIZED OPTICAL SEMICONDUCTOR DEVICE

摘要

PURPOSE:To realize high speed processing through the control of stray capacitance and induced inductance L by setting the height of a small size optical semiconductor device after mounting on a printed circuit board lower than the height of a device of the prior art and also laying orderly inner leads. CONSTITUTION:An optical semiconductor element 2 and an integrated circuit for driving the same are mounted in such a manner that the printed circuit board becomes in parallel with inner leads for considering introduction of multi- pin structure by utilizing a plate type conductive material such as DIP, instead of using SIP in the prior art. Therefore, a light transmitting resin 3 to be molded is provided with a projected portion at the outside of the flat area corresponding to an optical fiber. As a result, the light axis extended from an optical fiber or an optical semiconductor element 2 is bent almost at the right angle at the interface of the light transmitting resin 3 and thereby a compact device ensuring high speed operation can be obtained by controlling a stray capacitance and a induced inductance L.