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Suggested Items

Partial HDI: A Delicate Balance

10/30/2024 | I-Connect007 Editorial Team
Partial HDI can be the perfect solution for designers faced with escape routing from tight-pitch BGAs. But there are a variety of material, signal integrity, and DFM trade-offs to understand before you get fully into partial HDI. We asked Stephen Chavez to explain the fundamentals, as well as the details, of this promising process. Are you using partial HDI?

Fresh PCB Concepts: The Critical Nature of Copper Thickness on PCBs

10/31/2024 | Team NCAB -- Column: Fresh PCB Concepts
PCBs are the backbone of modern electronics and the copper layers within these boards serve as the primary pathways for electrical signals. When designing and manufacturing PCBs, copper thickness is one of the most critical factors and significantly affects the board’s performance and durability. The IPC-6012F specification, the industry standard for the performance and qualification of rigid PCBs, sets clear guidelines on copper thickness to ensure reliability in different environments and applications.

Book Excerpt: The Printed Circuit Designer’s Guide to... DFM Essentials, Ch. 1

10/25/2024 | I-Connect007
The guidelines offered in this book are based on both ASC recommendations and IPC standards with the understanding that some may require adjustment based on the material set, fabricator processes, and other design constraints. This chapter details high-frequency materials, copper foil types, metal core PCBs, and the benefits of embedded capacitance and resistor materials in multilayer PCBs.

Designers Notebook: Implementing HDI and UHDI Circuit Board Technology

10/23/2024 | Vern Solberg -- Column: Designer's Notebook
To accommodate new generations of high I/O semiconductor packaging, circuit board technology has undergone significant changes in both the fabrication process method and the criteria for base material selection. The reason behind these changes is the new high-function semiconductor package families that require more terminals than their predecessors and a significantly narrower terminal pitch.

Partial HDI: A Complete Solution

10/10/2024 | I-Connect007 Editorial Team
We recently spoke with IPC instructor Kris Moyer about partial HDI, a process that’s recently been growing in popularity. Partial HDI allows designers to escape route out from tight-pitch BGAs on one layer, where a mechanically drilled plated through-hole is not an option, while avoiding the complexity and expense of sequential lamination cycles. As Kris explains, this process doesn’t add much to the cost, and it’s fairly straightforward. But there are some competing signal integrity and fabrication requirements to contend with. We asked Kris to walk us through this process.
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