What does coc chip package mean?

Coc chip package is the shell of chip package, that is, the semiconductor integrated circuit chip is installed, which has the functions of placing, fixing, sealing, protecting the chip and enhancing the electrothermal performance.

Coc chip is the packaging and installation shell of semiconductor integrated circuit chip, which plays the roles of installation, fixation, sealing, chip protection and enhancement of electrothermal performance. The pins of the package shell are connected by wires through the tin points on the chip, and these pins are connected with other devices through wires on the printed circuit board, thus realizing the connection between the internal chip and the external circuit.

Chip carrier package:

Chip carrier package appeared in coc chip package in 1980s, including ceramic leadless ceramic chip carrier LCCC (leaderless ceramic chip carrier), plastic leaded chip carrier PLCC (plastic led chip carrier), small size package SOP(Small Outline Package) and plastic quad flat package PQFP(Plastic Quad Flat Package).

Coc chip packaging takes a CPU with the center distance of 0.5mm between the pad of QFP package and 208 I/O pins as an example. The overall size is 28×28mm and the chip size is 10× 10mm, so the chip area/package area = 10× 10/28× 28 =