Square resistance and resistance are two very important parameters in circuit design, and there is a conversion relationship between them.
Square resistance is like the resistance of a thin layer of material (such as a thin film), but it is measured in area in ohms per square (square).
Resistance is the obstacle encountered when the current passes through the conductor, which is related to the resistivity, conductor length and cross-sectional area of the material, and the unit is ohms ( ).
If you know the volume resistivity (denoted by ) and film thickness s of the material, you can calculate the square resistance r by the formula r=p s. Similarly, if we know the square resistance rs and the side length l of a square, then the total resistance r is rs l.
The square resistance is usually measured using the four-probe method, which gives an accurate square resistance value because it excludes the influence of contact resistance. The resistance can be measured directly with conventional resistance measuring instruments, such as multimeters.
In general, the conversion of square resistance and resistance depends on the material properties and shape size, and measuring them requires specialized instruments and methods. When designing and manufacturing electronic products, it is crucial to understand these concepts in order to ensure the performance of the product.