QFP Packages-Commonly used component package types

Are you tired of struggling with component shortages? Do you have a love-hate relationship with those necessary IC chips? Well, fear not! FS Technology, the ultimate turnkey PCBA manufacturer in China, has got your back. We source components from certified suppliers and deliver them on time, every time. In this article, we’re going to give you the lowdown on one type of surface mount IC package—Quad Flat Package. So sit back, relax, and get ready to become a QFP package expert.

What is a QFP Package?

QFP, which stands for Quad Flat Package, is a type of surface-mount integrated circuit (IC) package that has gained popularity due to its cost-effectiveness and compact design, making it a popular choice for electronic products.

This package has a square or rectangular shape, with component leads extending from all four sides of the package body. The leads can be bent at right angles and distributed evenly along the sides of the package. QFP IC packages come in various sizes, ranging from small packages with 32 pins to larger ones with hundreds of pins.

The leads on a QFP package are arranged in a grid pattern with a pitch ranging from 0.4 mm to 1.0 mm or more. They are thin and flexible, designed for SMT assembly to printed circuit boards. To ensure good electrical contact with the PCB pads, the leads are typically plated with conductive materials like gold or tin.

Mounting a QFP package onto a PCB involves aligning the IC leads with the PCB pads and then soldering them in place using a soldering iron or a reflow oven. During the soldering process, the solder paste on the PCB pads melts and connects the QFP leads to the pads. The surface tension of the molten solder secures the QFP package onto the PCB.

QFP Packages

Key Features of QFP Packages

One of the key advantages of QFP packages is their use of surface-mount technology. SMT is a faster and more reliable method of assembling electronic components onto a printed circuit board (PCB) than traditional through-hole PCB assembly. QFP IC packages with SMT leads can be placed onto the PCB using automated pick-and-place machines, significantly reducing the time and cost of assembly.

QFP package dimensions are designed to be compact, making them ideal for high-density packaging applications.

They can have a large number of leads, making them suitable for high-performance and complex applications.

QFP have excellent thermal performance due to the large exposed pad on the underside of the package. This exposed pad can be connected to a thermal via to provide a direct thermal path to the PCB, which helps to dissipate heat from the IC.

The low profile of the QFP quad flat package helps to reduce the overall height of the PCB.

QFP IC Package Style

Bumpered Quad Flat Package (BQFP): This form of quad-flat package includes protective extensions at the four corners to safeguard the leads from mechanical damage before soldering. The fine pitch of the leads makes the QFP susceptible to pin bending and damage.

Bumpered Quad Flat Package with Heat Spreader (BQFPH): This quad-flat package includes pin protectors at the corners to prevent pin damage and heat spreaders to dissipate higher levels of power.

Fine-pitch Quad Flat Package (FQFP): As the name suggests, this is a quad-flat package with a fine pitch for the pins.

Ceramic Quad Flat Package (CQFP): This type of quad-flat package is upgraded to a high-quality version with a ceramic package.

Low-profile Quad Flat Package (LQFP): This is a variation of metric QFP or MQFP with a thinner body height of only 1.4mm to solve height issues. It has a standard lead-frame footprint of 2.0mm, with lead counts ranging from 32 to 256, and body sizes ranging from 5x5mm to 28x28mm.

Metric Quad Flat Package (MQFP): This is a type of QFP with pin spacing and other measurements defined using the metric system, as opposed to Imperial measurements used by standard QFPs.

Plastic Quad Flat Package (PQFP): This is a QFP that uses plastic as its packaging material.

Thin Quad Flat Package (TQFP): This is a low-profile QFP package with a thickness of around 1mm.

Plastic Quad Flat No-Lead (PQFN) Package: This is a standard QFP package with a plastic body and no leads extending from the sides of the package.

Quad Flat No-Lead (QFN) Package: This is a QFP package with no leads extending from the sides of the package. Instead, the leads are located on the underside of the package.

Applications of QFP Packages

This packaging form is widely concerned by the electronic application market, especially in telecommunication equipment, consumer electronics and industrial control PCBA. Commonly used electronic equipment includes:

  • Microprocessors
  • Digital Signal Processors (DSPs)
  • Memory Chips
  • FPGAs (Field Programmable Gate Arrays)
  • Power Management ICs
  • Audio and Video Processing ICs


In summary, QFP packages are a popular packaging option for electronic devices due to their compact size, surface mount technology, large lead count, excellent thermal performance, and low profile. There are several types of QFP packages, each with its unique features and benefits. QFP packages are used in many high-performance electronic devices, and their popularity is expected to continue to grow in the future.

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