The working principle of the chip can be summarized into the following key links:
1. Semiconductor physical mechanism
PN junction and doping technology: The basis of the chip is that semiconductor materials (such as silicon) are doped to form P-type (mainly holes) and N-type (mainly electrons) regions, and the two are combined to form a PN junction. The PN junction has unidirectional conductivity and is the basis of components such as diodes and transistors.
The role of the transistor: The transistor is the core unit of the chip. It controls the conduction or cutoff between the source and the drain through the gate voltage to achieve signal amplification or switching functions. Its on/off state corresponds to the "1" and "0" of the binary signal.
2. Logic gate and integrated circuit design
Transistors are combined into logic gates (such as AND, OR, NOT) to process digital signals through Boolean operations. For example, multiple transistors can form an adder or a memory unit.
Modern chips integrate billions of transistors on silicon wafers through lithography and etching processes to form a complex circuit network.
3. Signal transmission and processing
The transistors are connected by metal wires inside the chip, and the paths are optimized to reduce parasitic capacitance and delay. High-frequency signal processing relies on the fast switching of transistors (millions of times per second).
Data storage is achieved by triggers or memory cells, which store information through charge states.
4. Light-to-electric conversion (special applications)
In scenarios such as SOI chip photodetectors, photons excite carriers in silicon, the insulating layer (BOX) reduces leakage current, and the metal electrodes output electrical signals to achieve efficient light signal detection.
Summary: The chip converts electrical signals into binary operations through a combination of semiconductor physics, transistor switches, and logic gates, and ultimately completes computing, storage, and communication functions. Its performance depends on process accuracy (such as nanoscale processes) and design optimization.
