Another term used is half-pitch, half of the distance between two identical components. So what is the exact difference between the three terms, and which one is the most descriptive of the size of a transistor? If you look at how actual IC fabrication is done you will see that the minimum feature size is the size or the width at which a transistor or any type of material on the silicon surface can be drawn at. This is usually analogous to the transistor gate length because the properties of the transistor depend on the ratio between the width and the length of the gate which essentially effects the flow of current through the junction.
If the minimum feature size can be reduced, this means the transistor length can be reduced effectively making the transistor smaller with the same electrical properties. This allows for lower current flow between the junction for the same purpose and lesser heat dissipation. Half-pitch is essentially the minimum distance between two features on the IC just like you mentioned. The size of the transistor is best described by it's gate length.
It's a little more complex than that as transistors normally require different ratios of width to length based on design requirements, so not all transistors on the IC will have the same width but they almost always have the same length which is analogous to the minimum feature size.
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Viewed 10k times. John John 21 1 1 gold badge 1 1 silver badge 2 2 bronze badges. Add a comment. Depending on the unit, this can be the size of a specific character, the line height , or the size of the viewport. Note: These units, especially em and rem , are often used to create scalable layouts, which maintain the vertical rhythm of the page even when the user changes the font size. Represents the calculated font-size of the element.
If used on the font-size property itself, it represents the inherited font-size of the element. Represents the x-height of the element's font. Equal to the computed value of the line-height property of the element on which it is used, converted to an absolute length. When used within the root element font-size , it represents its initial value a common browser default is 16px , but user-defined preferences may modify this. When used on the font-size or line-height properties of the root element, it refers to the properties' initial value.
Viewport lengths are invalid in page declaration blocks. Absolute length units represent a physical measurement when the physical properties of the output medium are known, such as for print layout.
This is done by anchoring one of the units to a physical unit, and then defining the others relative to it. The anchor is done differently for low-resolution devices, such as screens, versus high-resolution devices, such as printers.
For low-dpi devices, the unit px represents the physical reference pixel ; other units are defined relative to it. Thus, 1in is defined as 96px , which equals 72pt.
The consequence of this definition is that on such devices, dimensions described in inches in , centimeters cm , or millimeters mm don't necessary match the size of the physical unit with the same name.
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