What is the square resistance of resistor paste and how to calculate it

Is resistance and square resistance the same thing? What is the connection between the two?

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Resistance and square resistance are not the same thing, but there is a certain correlation between the two.

Resistance refers to the ratio of the potential difference generated by the current passing through a conductor to the current. It is a physical quantity that describes the ability of a substance to resist the passage of electric current, usually represented by the Greek letter ρ (rho), with the unit being ohms (Ω).

Square resistance refers to the resistance value per unit area, which can also be understood as electrical resistivity. It is a physical quantity that represents the ability of a substance to resist the passage of electric current, usually represented by the Greek letter ρ (rho), with the unit being ohms per meter (Ω· m).

It can be seen that both resistance and square resistance describe the ability of a substance to resist the passage of current, but resistance describes the degree of resistance of the substance itself, while square resistance describes the magnitude of resistance per unit area. In practical applications, the square resistance can be obtained by dividing the resistance of a substance by its cross-sectional area. Therefore, there is a certain correlation between the two.

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What is Fangzu?

Is there a unit for blocking?

How to measure square resistance?

How to design the resistance of thick film circuits?

resistor pasteThe square resistance refers to the resistance value per unit area, which can also be understood as electrical resistivity. In electricity, resistivity is a physical quantity that represents the ability of a substance to resist the passage of electric current, usually represented by the Greek letter ρ (rho), with the unit being ohms per meter (Ω· m). The resistivity is related to the magnitude of the resistance, the physical properties of the material, and temperature. When the slurry contains particles or additives with high conductivity, the electrical resistivity will decrease, resulting in better conductivity of the resistive slurry.

 

At a length of l, a width of w, and a height of d (i.e. film thickness), where L=l, S=w*d, So R=ρ * l/(w * d)=(ρ/d) * (l/w). Let l=w, then R=(ρ/d), where ρ is the resistivity of the material and R is the square resistance.

Definition: In a film with a length of l, a width of w, and a height of d (i.e. thickness), where L=l, S=w*d, So R=ρ * l/(w * d)=(ρ/d) * (l/w). Let l=w, then R=(ρ/d), which is the square resistance.

resistor pasteThe resistive film layer formed by printing and sintering is tested for its square resistance at a specific thickness. What is square obstruction? Square resistance refers to the resistance between the thick film edges of a square resistor, as shown in Figure 1, which is the resistance value from side B to side C. Block resistors have a characteristic that the resistance of any square of any size is the same from edge to edge at a specific thickness, regardless of whether the side length is 1 meter or 0.1 meters. For the thick film resistor industry, we generally define the thickness as 10 microns, and the resistance size of a square with equal length and width is the square resistance of the resistor paste.

So the resistance that is commonly referred to as total resistance is the sum of many square resistors connected in series.

Simply put, a square resistor is the resistance size of a resistive film with a thickness of 10 microns within a block with an aspect ratio (length divided by width) of 1.

The unit of square resistance is Ω/□, ohms/square)

Many block resistors are strung together to form a resistor, so the total resistance is the collection of block resistors. The total resistance is equal to the length of the resistor divided by its width, and then multiplied by the number of square resistances.

The design of resistance circuits should consider square resistance, substrate size, and total resistance size. To design circuits with appropriate width and length on a certain size of substrate.

The total resistance can be achieved by designing different aspect ratios. Under specific aspect ratios, the total resistance can be changed by adjusting the thickness of the film layer. The total resistance can also be achieved by selecting different square resistances resistor pasteTo achieve.