The development history of smd capacitor

In the so-called electronic tube period with electronic tubes (vacuum tubes) as the core, it was about the 1940s to the early 1950s. Because the volume of the electronic tube itself was relatively large and the working voltage was relatively high, the smd capacitor did not need to be considered too much. The size is to be able to withstand very high working voltage, and the structure at that time was mainly cylindrical.

In the late 1950s, electronic technology entered the semiconductor period with transistors as the core. Because the volume of transistors was much smaller than that of electron tubes and the working voltage was not high, SMD capacitor began to pay attention to the problem of reducing the size and ease of assembly. , So leaded capacitor with plug-in assembly structure (THT) dominate.

Since the 1980s, electronic technology has entered a period with large-scale integrated circuits and very large-scale integrated circuits as the core. Because the volume and weight of integrated circuits are rapidly reduced, the requirements for capacitor at this time are focused on reducing the size and lightening. Because of the weight, the leadless capacitor, which are suitable for surface mounting, called smd-type (SMT) capacitor, emerged and gradually became the mainstream of capacitor.