5.1 The basic introduction
There are few conventional DIP packages that can meet the requirements of the packaging. The global surface-mount packages are very complicated. The present package types and the lead configuration both are various.
Besides, the demands for SMT chips are increasing day by day. The surface mount component must withstand the high temperature during the soldering procedure to meet the required product quality.
In the market, there are various component types that can meet some electronic demands with a severe problem of component proliferation. However, some components have a good standard, also some standards are not suitable or even nonexistent.
5.2 The categories of SMD components.
With the surface mount technology getting more and more mature, the electronic industry is improving day by day in offering the surface mount components for related industries to solve the economic, technical, and standardization issues.
Now, there are both active and passive electronic components for surface mount devices.
- Passive SMD Components
Passive SMD Components
- The definition of passive SMD components:
Don’t worry, the passive surface mounting is not complicated at all. The core group of passive SMD including tantalum capacitors, monolithic ceramic capacitors, as well as thick and thin-film resistors.
Usually, their shapes are rectangular and cylindrical. With regard to the surface mount capacitors, ceramic or tantalum both are dielectric. Surface mount tantalum capacitors are able to provide high capacitance-voltage products and high volumetric efficiency with high reliability.
- The core group of passive SMD:
Besides, the electronic industry requires different sizes of surface mount resistors and capacitors for meeting various demands.
Please check these three passive SMD component in the following:
- Ceramic Capacitors:
Surface mount capacitors do not have any leads and are able to be placed on the bottom of the PCB board, hence it is a better choice for high-frequency circuit applications. 8 mm tape and reel are the most popular packaging for ceramic capacitors.
Both the decoupling applications and frequency control adopt the surface mount capacitors. The volumetric efficiency can be improved by multilayer monolithic ceramic capacitors that have different dielectric types including COG or NPO, X7R, Z5U, and Y5V.
Based on the reliability, surface mount capacitors have been widely used in aerospace applications, military equipment as well as automotive applications.
- Tantalum capacitors:
We can also call it as plastic molded tantalum capacitors, it has leads instead of terminations and a beveled top as a polarity indicator.
When using the molded plastic tantalum capacitors, we do not need to concern the soldering or placement problems. There are standard and extended range molded plastic tantalum capacitors.
plastic molded tantalum capacitors
Based on the various components sizes, the capacitance value for tantalum capacitors are from 0.1 to 100 µF and from 4 to 50 V dc.
Also if you have any special demands, you can choose the customized tantalum capacitors according to the different requirements of the different applications.
In addition, tantalum capacitors are available in the forms of reel, tapes, and waffle packs, what is more, tantalum capacitors can be acceptable with or without marked capacitance values in bulk.
- Surface Mount Discrete Resistors (SMD Resistor):
The surface resistors have two main types, thick and thin film. Please check their details in the following:
SMD Resistor
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