Designing a PCB with DEX > Parts > PCB Device Types > Device Package Types > PCB Device Packages > Integrated Circuits > BQFP

The Bumpered Quad Flat Pack (BQFP) is a specific type of packaging for integrated circuits, somewhat similar to the standard Quad Flat Package (QFP) but with distinctive features that enhance its durability and utility in certain applications. Here's an in-depth look at the BQFP:

Overview of Bumpered Quad Flat Pack (BQFP)

•Structure & Design

•The BQFP is a type of flat package with leads extending from all four sides, typical of the QFP family. The leads are "gull-wing" shaped, extending out and down from the package, making them suitable for surface mounting on PCBs.

•What sets the BQFP apart are the added "bumpers" or "rails" on two or four sides of the package. These bumpers are raised edges that protect the leads against mechanical damage during handling, shipping, and assembly.

•Protection Mechanism

•The bumpers in a BQFP serve as guards, standing taller than the leads, so if the package is set down, bumped, or otherwise mishandled, the bumpers take the brunt of the impact instead of the delicate leads.

•This feature is particularly valuable during the manufacturing and assembly processes, where components might be mechanically stressed. By avoiding bent or broken leads, the bumpers help ensure that the ICs are properly mounted and connected, reducing potential connection issues or short circuits.

•Applications & Advantages

•The BQFP is used in environments where there is a higher likelihood of mechanical stress or where packages are manually handled more frequently. It's beneficial for high-reliability applications where the integrity of the lead connections is critical.

•While providing protection, the bumpers don't significantly increase the package's footprint. Thus, BQFPs maintain the advantage of high lead counts without a large increase in space requirements, a crucial factor in modern electronics' miniaturization trend.

•Manufacturing & Assembly Considerations

•While the bumper design offers protection, it also requires changes in the handling equipment, such as trays, sockets, and pick-and-place tools, to accommodate the package's slightly different exterior dimensions.

•The soldering process and inspection might also need minor adjustments compared to standard QFPs because the bumpers can potentially obstruct certain angles or approaches for soldering tools or inspection cameras.

•Reliability and Performance

•Beyond the mechanical protection, the performance and reliability of BQFPs are similar to standard QFPs. They provide reliable connections with good thermal and electrical performance and are suitable for a wide range of applications, including consumer electronics, automotive, telecommunications, and more.

In summary, BQFPs offer an enhanced level of mechanical protection for quad flat packages, ensuring that the leads — critical for the component's operation on the PCB — are safeguarded from common types of damage. This security makes BQFPs an attractive option for any application requiring an extra degree of reliability during the component's handling and operation.

BQFP - Bumpered Quad Flat Pack

BQFP - Bumpered Quad Flat Pack