The following is the information I know, I hope it is useful to you~

Electronic materials are also called electronic components, and electronic components are the general term for components and devices.

1. Components: Products that do not change their molecular composition when the factory processes the product can be called components, and do not require devices that can generate electricity.

It includes: resistors, capacitors, and inductors. (Also known as Passive Components)

(1) Circuit devices: diodes, resistors, etc.

(2) Connection devices: connectors, sockets, connections Cables, printed circuit boards (PCB)

2. Devices: Devices whose molecular structure is changed by the factory during production and processing are called devices

Devices are divided into:

1. Active device, its main characteristics are: (1) It consumes electric energy by itself (2). It also requires external power supply.

2. Discrete devices are divided into (1) bipolar transistors (2) field effect transistors (3) thyristors (4) semiconductor resistors and capacitors

3. Simulation Integrated circuits mainly refer to integrated circuits that are composed of capacitors, resistors, transistors, etc. and are integrated together to process analog signals. There are many analog integrated circuits, such as integrated operational amplifiers, comparators, logarithmic and exponential amplifiers, analog multipliers (dividers), phase-locked loops, power management chips, etc. The main circuit components of analog integrated circuits are: amplifiers, filters, feedback circuits, reference source circuits, switched capacitor circuits, etc. Analog integrated circuit design is mainly obtained through manual circuit debugging and simulation by experienced designers. Correspondingly, most digital integrated circuit designs are automatically synthesized under the control of EDA software using hardware description languages.

4. Digital integrated circuits are digital logic circuits or systems made by integrating components and connections on the same semiconductor chip. According to the number of gate circuits or components and devices contained in digital integrated circuits, digital integrated circuits can be divided into small-scale integrated (SSI) circuits, medium-scale integrated MSI circuits, large-scale integrated (LSI) circuits, very large-scale integrated VLSI circuits and Ultra Large Scale Integration (ULSI) circuits. Small-scale integrated circuits contain less than 10 gate circuits, or the number of components does not exceed 100; medium-scale integrated circuits contain between 10 and 100 gate circuits, or the number of components is between 100 and 1,000; Large-scale integrated circuits contain more than 100 gate circuits, or the number of components is between 10 and 10; very large-scale integrated circuits contain more than 10,000 gate circuits, or the number of components is between 10 and 10; The number of components in a VLSI is between 10 and 10. It includes: basic logic gates, flip-flops, registers, decoders, drivers, counters, shaping circuits, programmable logic devices, microprocessors, microcontrollers, DSP, etc.

The general procurement process is as follows

1. Participate in the development of new products;

2. Basic information and specifications of materials that break down the material composition of new products, Recognition of unit price, batch unit price, and quality requirements;

3. Find suppliers;

4. Determine samples;

5. Issue a purchase contract or Procurement agreement;

6. Time, quality and quantity control as required;

7. Supplier management;

8. Supplier reconciliation;

9. Payment!