Fuse resistance, to be formed by the resistant board for the fuel level sensor, and the inter-electrode which was formed on the form

摘要

PROBLEM TO BE SOLVED: To shorten time for optimal pattern design and design verification of a fuse resistor on a substrate.;SOLUTION: An interruption time T (s) as a burning-out time of a resistor main body 34 has the following relationship between impressed power P (W) on the resistor main body 34 and a resistance area S (mm²) of the resistor main body 34. The interruption time T (s) is represented by an expression (1) of T=25000(P/S)^-2.7. Here, the impressed power P (W) is represented by en expression (2) of P=V²/R, and is determined by impressed voltage V (V) and a resistance value R (Ω) after trimming the resistor main body 34. The resistance area S is represented by an expression (3) of S=L×W-(L×W1)/2, and is an area of the shadow area of the resistor main body 34.;COPYRIGHT: (C)2009,JPO&INPIT