Controlled Impedance is the maintenance of a specified tolerance in the characteristic impedance of an interconnect line (transmission line) connecting different devices on a circuit. It is often used for high-speed digital or high-frequency analog circuits.
| Applications | Fabrication issues |
| 1. RF-microwave | 1. Design verification |
| 2. Telecommunications | 2. Inaccurate etching |
| 3. DUT chip testing | 3. Product final verification / testing |
| 4. Computing | Click here for more |
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