Advanced Packaging with Zuken’s CR-8000 Design Force

Advanced Packaging with Zuken’s CR-8000 Design Force


Advanced packaging techniques such as system-in-package (SiP), fan-out wafer-level packaging (FOWLP), 3D die stacks, etc. have been around for over a decade. Yet with any other EDA design tool, it is still a tedious, time-consuming, and error-prone process to implement these designs.

It seems surprising that there are so few reliable EDA solutions out there. But CR-8000 Design Force is definitely the tool to look to when tackling advanced package design! Take a look below and see why.

Advanced Packaging with CR-8000 Design Force
CR-8000 Design Force is a native 3D design environment. With the click of a button, you can switch between 2D to 3D views and design in either mode; this comes in handy when designing complex packages.

CR-8000 Design Force was architected as a hierarchical printed circuit board and integrated circuit package design database. The image below shows an example of a package-on-package (PoP) design. The lower package contains two ASICs, while the upper package has six memories. You can easily switch from substrate to substrate and make design changes. Pin swaps at the shared pins are passed seamlessly between the designs.

The natural hierarchical and 3D architecture of this tool makes it simple to create any type of advanced package design you can imagine. At the recent IWLPC conference in San Jose, Samsung presented on Fan-out Panel Level Packaging. CR-8000 Design Force is the natural choice for this type of design as it doesn’t require re-tooling (or re-coding) to make it work!

CR-8000 Design Force enables co-design between all parts of the design in an intuitive flow. Not just IC package co-design functionality in a separate design environment, but co-design natively built into the software’s DNA. With CR-8000 Design Force, you don’t need a separate co-design tool. It provides package-to-package co-design; IC-package; package-to-board; board-to-board; board-on-board; board-to-assembly panel; co-analysis between layout and analysis tools, and data exchange with 3rd-party EDA vendors. The image below illustrates the “co-design is everywhere” concept.

System Co-Design

Advanced Packaging Examples

Let’s take a look at some specific examples of design capabilities in CR-8000 Design Force.

IC-Package Co-design

IC-Package Co-designThe first example is an IC-driven co-design scenario. The package design team imports the I/O driver placement through LEF/DEF import, creates a bump pattern for the IC, and optimizes the bump pattern and the package connectivity in Design Force. The IC design is all done in a native OpenAccess environment (inside Design Force, no less!).

Pin assignments are made to the package, and optimization of pin assignments operates in a bidirectional manner between the IC and the package.

advanced packaging Pin assignments

The final result is a clean pathway from I/Os to package balls. Any changes to the die are exported to a DEF file.

clean pathway from I/Os to package balls

Package-on-Package Clearance and Collision Checks

The second example is a Package-on-Package (PoP) design flow. It demonstrates collision and clearance checks between devices on the top and bottom packages of a PoP design. These components are imported either from LEF/DEF, or are fixed components in a library. In the video, the top package has a memory device on its underside, and the bottom package has an ASIC on the top layer. The movie shows collision and clearance checks between the devices. This functionality is especially useful in designs with many passive components on the facing boards to ensure collisions do not occur when the part is assembled.

Daisy Chain Test Chip

Daisy Chain Test ChipThe final example illustrates the creation of a daisy chain test configuration between two packages and between a package and a die in a PoP design. A daisy chain test configuration is a stitching of pins between two (or more) different components. It provides a nearly zero-Ohm path between a set of pins and is used for a variety of tests to validate and improve the assembly process. The image below shows a simple example of two daisy chains (daisy chains 1 and 3) between two packages in a package-on-package configuration. It also shows a single daisy chain (daisy chain 2) between a flip-chip die and the bottom package.

Creating this type of netlist is a tedious and error-prone process with most tools. However, because CR-8000 Design Force is naturally a 3D, hierarchical design system, it provides an easy-to-use utility to create and visualize complex daisy chain configurations. The chain is created or modified by selecting a set of pins and running the command. The netlist for both sets of pins is created (or updated) and the routing for both substrates is created.

A Matter of Minutes

The first example below shows a 2D view of a PoP design with a single flip-chip. There are four daisy chains between the two packages around the perimeter, and there are 15 daisy chains between the die and the bottom package. This design could take days or weeks to complete, but CR-8000 Design Force only takes minutes to complete all chains and routing!


CR-8000 Design Force is a powerful environment that provides hierarchical design layout and assembly, 3D and 2D design views that enable the assembly of complex packages and PCB configurations in one database, and in one design canvas. Because of this, creating a package-on-package fan-out wafer level design, or a complex PCB, package, and die stack up is rather simple to do. Complex daisy chain designs are quickly completed.

Memories in a top package can easily drive the pinout of ASICs in a bottom package. Connectors on a PCB can drive net assignment to die pins in a die stack. 2D and 3D modes provide an intuitive, dynamic window into the layout of the design. Collision checks and clearance checks provide a view into the 3D space of your design. Design Force is the tool of choice for anyone designing advanced packages of all types.

Tom Whipple
Tom Whipple
  • Blog
December 13, 2021
High Speed Design Demystified: LPDDR4 Design Explained

A trend towards low power design prevails in the electronics industry today and is not likely to change in the near future. This development is driven by many reasons but primarily by the performance and storage density demands of mobile devices, where a reduction of the power consumption is crucial to extending battery life without sacrificing the bandwidth. This comprehensive guide helps you mitigate LPDDR4 Design.

Read now
  • Webinar
September 15, 2021
CR-8000 with the Ansys Electronic Desktop

This webinar will introduce the use of the Ansys Electronic Database (EDB) format to share information from CR-8000 Design Force to Ansys, the advantages beyond the former ANF-based interface, and how this can help users be more effective and productive.

Watch Now
  • Webinar
August 18, 2021
IC Power Module Design with CR-8000 Design Force

The typical design flow for a power module is in MCAD, where only structural analysis is possible. Moving to a new design flow using CR-8000 Design Force also allows for electrical analysis too. This webinar will demonstrate the features and benefits of this new design flow.

Watch Now
  • Webinar
August 18, 2021
PCB Creepage Checking According to IPC Standards

Failing to adhere to Electrical insulation requirements could prevent your product from being released. Zuken's CR-8000 constraints management and safety standard checking tools can help you meet the required IPC standards.

Watch Now