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Taiyo Yuden SAW and BAW Band 7 Duplexer integrated into Skyworks’ System in Package

3 490 €

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Taiyo Yuden SAW BAW Band 7 duplexer system plus consulting flyer

Taiyo Yuden’s Well-Proven Metal Seal Packaging and SAW/BAW technology in LTE Band 7 high isolation duplexer used in Skyworks’ PAMiD

In the last five years, Skyworks has been the largest radio-frequency (RF) component supplier for Huawei. In Huawei’s last flagship, the Mate 9 Pro, and the P10 series, Skyworks supplies entire Long-Term Evolution (LTE) front-end solutions based on its SkyOne® Technology. The solutions comprise Low-, Mid- and High-Band front end modules (FEMs) featuring Surface Acoustic Wave (SAW) and Bulk Acoustic Wave (BAW) filters. Skyworks is known to produce its own SAW filter and to outsource the BAW filter. In its High-Band PA Module integrated Duplexer (PAMiD), Skyworks integrates a duplexer supplied by Taiyo Yuden in metal seal packaging featuring a SAW and a Thin Film Bulk Acoustic Resonator (FBAR)-BAW filter based on Taiyo Yuden Technology.


Taiyo Yuden SAW BAW Band 7 duplexer 2017 system plus consulting

The filters are located in a System In Package (SiP) with a power amplifier, switch and a RF integrated circuit. The device is a custom version of a Taiyo Yuden commercial device. The duplexer’s SAW filter uses sapphire and lithium tantalate substrates and its BAW filter has an original FBAR design using an air gap cavity on a silicon substrate.

In this report, the complete duplexer is analyzed, from the filters to the packaging developed by Fujitsu Media Limited, which was bought by Taiyo Yuden. The report includes a complete analysis of the package, the SAW filter and the BAW filter, featuring a cost analysis and price estimation for the device. A schematic of the BAW filter is also provided to understand the difference between shunt and series cells.

Finally, the report includes complete performance and technology comparisons with the previous generation of the band 7 duplexer from Taiyo Yuden and a technology comparison with BAW filters and packaging solutions from Qorvo and Broadcom.


Taiyo Yuden SAW BAW Band 7 duplexer system plus consulting












Table of contents

Overview / Introduction


Taiyo Yuden Company profile


Huawei Mate 9 Pro Teardown


SKY78117 Teardown


Physical Analysis

> Physical Analysis Methodology
> Package
- View and dimensions
- Package opening
- Package cross-section
> SAW Filter
- View, dimensions and markings
- IDT and reflector
- Cross-section: substrate, pads, IDT
> BAW Filter
- View, dimensions and markings
- Die overview: pads, apertures, FBAR cells, frequency control features, equivalent circuit,
- Cross-section: substrate, pads, FBAR shunt and series cells
> Physical Data Summary










































Physical Comparison with previous duplexer generation

> Package, Schematics, Design



Physical Comparison with Broadcom and Qorvo

> Package, BAW Technology



Manufacturing Process Flow

> Filter Process
> Filter Wafer Fabrication Unit
> SAW Filter Process Flow
> BAW Filter Process Flow
> Packaging Process Flow
> Final Assembly Unit



Cost Analysis

> Cost Analysis Overview
> The Main Steps Used in the Economic Analysis
> Yield Hypotheses
> SAW and BAW Die Cost
- SAW filter and BAW filter front-end (FE) cost
- SAW filter and BAW filter FE per steps cost
- Back-end: tests and dicing
- SAW filter and BAW filter wafer and die cost
> Component
- Packaging cost
- Packaging cost per process step
- Component cost


Estimated Price Analysis



About the authors


System Plus Consulting specializes in the cost analysis of electronics, from semiconductor devices to electronic systems.

Created more than 20 years ago, System Plus Consulting has developed a complete range of services, costing tools and reports to deliver in-depth production cost studies and estimate the objective selling price of a product.

System Plus Consulting engineers are experts in:

  • Integrated Circuits 
  • Power Devices & Modules 
  • MEMS & Sensors
  • Photonics 
  • LED 
  • Imaging 
  • Display 
  • Packaging 
  • Electronic Boards & Systems.

Through hundreds of analyses performed each year, System Plus Consulting offers deep added-value reports to help its customers understand their production processes and determine production costs. Based on System Plus Consulting’s results, manufacturers are able to compare their production costs to those of competitors.

System Plus Consulting is a sister company of Yole Développement.

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  • Detailed photos

  • Precise measurements

  • Material analysis

  • BAW filter schematics

  • SAW and BAW filter manufacturing process flow

  • Metal seal packaging process flow

  • Supply chain evaluation

  • Manufacturing cost analysis

  • Estimated sales price

  • Filter technology comparison with Qorvo and Broadcom filters

  • Packaging technology comparison with Qorvo and Broadcom

  • Comparison with previous generation of Taiyo Yuden Band 7 Duplexer