Czochralski-Verfahren und optical telegraph: was sie gemeinsam haben
- Schritt 1. Czochralski-Verfahren — wird verwendet in — Silicon wafer. Ingots are grown by the Czochralski method.
- Schritt 2. Silicon wafer — ist Material für — Integrated circuit. Chips are made on wafers.
- Schritt 3. Integrated circuit — ist Teil von — Mobile phone. Inside a phone are microchips: processor, memory, radio.
- Schritt 4. Mobile phone — entwickelte sich aus — Telephone. A mobile phone keeps the function of a telephone, replacing the wire with a radio channel.
- Schritt 5. Telephone — entwickelte sich aus — Electrical telegraph. The telephone grew out of attempts to send several signals over telegraph lines (the “harmonic telegraph”).
- Schritt 6. Electrical telegraph — entwickelte sich aus — Optical telegraph. The electrical telegraph replaced semaphore lines.