| 摘要 |
<p>PURPOSE: To optimize the operational parameters of a device by constituting a semiconductor device of first and second transistors and first through fourth conduction elements for connecting them and making desired conduction elements of laser programmable fuses which can be blown out. CONSTITUTION: When the size of an MESFET 40A constituting a semiconductor device increases, an external current increases to raise the operating speed. Consequently, a desired operating rate is set for a predetermined power level by selecting the size of the FET 40A appropriately. Alternatively, the characteristics are corrected by connecting a larger number of secondary elements if the threshold voltage of the FET 40A is high at the time of first inspection and thereby the operating speed of the circuit is reduced. Because of this, at least two of first to fourth conduction elements are formed of laser programmable fuses 80 which are blown out by irradiating laser so that characteristics satisfying a purpose are exhibited.</p> |
