What is CSP

By Bester PCBA

Last Updated: 2023-08-14

What is CSP

CSP (chip scale package) is a type of integrated circuit package used in the PCB industry. Originally, CSP stood for chip-size packaging, but it was later adapted to chip-scale packaging due to the limited number of packages that are actually chip size.

Certain criteria must be met to qualify as a chip scale package. The package’s area should not exceed 1.2 times the area of the die, ensuring that it closely matches the size of the integrated circuit. CSPs are typically single-die packages that can be directly surface mounted onto the PCB without the need for additional components or interposers. Another important criterion is the ball pitch, which should be no more than 1mm. The ball pitch refers to the distance between the centers of adjacent solder balls on the package.

CSPs have gained popularity in the industry due to their compact size and high functionality. There are two main types of CSPs: flip chip ball grid array (BGA) packaging and wafer-level chip-scale package (WL-CSP or WLCSP). Flip chip BGA packaging involves mounting the die on an interposer with pads or balls for connection to the PCB. On the other hand, wafer-level chip-scale packaging features pads that are etched or printed directly onto the silicon wafer, resulting in a package that closely matches the size of the die.

Frequently Asked Questions

What Is the Difference Between CSP and Wlcsp

WLCSP technology stands out from other ball-grid array (BGA) and laminate-based CSPs due to its unique feature of not requiring bond wires or interposer connections. This technology offers several key advantages, including minimized die to PCB inductance, reduced package size, and improved thermal conduction characteristics.

What Is the Difference Between CSP and Flip Chip

FC-CSP, also known as Flip Chip-CSP, refers to the process of flipping the chip mounted on the PCB. Unlike traditional CSP, the main distinction lies in the method of connecting the semiconductor chip to the substrate, which involves the use of bumps instead of wire bonding.

What Size Is a CSP LED

CSP LEDs, on the contrary, are manufactured in a compact size measuring 1.1×1.1 mm. The size of a CSP LED is comparable to that of an LED chip or slightly larger, up to 20 percent. Despite its diminutive dimensions, CSP LEDs possess remarkable luminosity, enabling them to emit high-performance light.

What Does CSP Mean LED

Chip Scale Package (CSP) LEDs are lambertian emitters that offer the highest luminance at the smallest size currently available in the market. These LEDs are ideal for dense clustering and high luminous flux output due to their superior quality, which eliminates the need for bond wires or spacing requirements.

What Is the Size of a CSP Package

These packages, known as chip-scale packages (CSP), have a size limitation. They are either no larger than 1.5 times the area of the die, or no more than 1.2 times the width or length of the die. Another definition applies if the carrier is a BGA type, where the solder-ball pitch should be less than 1 mm.

What Are the Advantages of Chip Scale Package

Chip-scale packaging offers several advantages, including the reduction of resistance, inductance, size, thermal impedance, and cost of power transistors. This results in improved in-circuit performance that is unparalleled.