Design and fabrication of a 29 μH bondwire micro-transformer with LTCC magnetic core on silicon for energy harvesting applications

Enrico Macrelli; Aldo Romani; Ningning Wang; Saibal Roy; Michael Hayes; Rudi P. Paganelli; Marco Tartagni

doi:10.1016/j.proeng.2014.11.597

Design and fabrication of a 29 μH bondwire micro-transformer with LTCC magnetic core on silicon for energy harvesting applications

Enrico Macrelli
, Aldo Romani
, Ningning Wang
, Saibal Roy
, Michael Hayes
, Rudi P. Paganelli
, Marco Tartagni

Research output: Contribution to journal › Article › peer-review

Abstract

This paper presents the design of a 1 : 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm² footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).

Original language	English
Pages (from-to)	1557-1560
Number of pages	4
Journal	Procedia Engineering
Volume	87
DOIs	https://doi.org/10.1016/j.proeng.2014.11.597
Publication status	Published - 2014
Event	28th European Conference on Solid-State Transducers, EUROSENSORS 2014 - Brescia, Italy Duration: 7 Sep 2014 → 10 Sep 2014

Keywords

Bonding
Harvesting
Inductors
Integrated
Low-temperature co-fired ceramic
LTCC
Magnetics
Silicon
Toroidal
Transformers

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10.1016/j.proeng.2014.11.597

Cite this

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title = "Design and fabrication of a 29 μH bondwire micro-transformer with LTCC magnetic core on silicon for energy harvesting applications",

abstract = "This paper presents the design of a 1 : 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm2 footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).",

keywords = "Bonding, Harvesting, Inductors, Integrated, Low-temperature co-fired ceramic, LTCC, Magnetics, Silicon, Toroidal, Transformers",

author = "Enrico Macrelli and Aldo Romani and Ningning Wang and Saibal Roy and Michael Hayes and Paganelli, \{Rudi P.\} and Marco Tartagni",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors. Published by Elsevier Ltd.; 28th European Conference on Solid-State Transducers, EUROSENSORS 2014 ; Conference date: 07-09-2014 Through 10-09-2014",

year = "2014",

doi = "10.1016/j.proeng.2014.11.597",

language = "English",

volume = "87",

pages = "1557--1560",

journal = "Procedia Engineering",

issn = "1877-7058",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Design and fabrication of a 29 μH bondwire micro-transformer with LTCC magnetic core on silicon for energy harvesting applications

AU - Macrelli, Enrico

AU - Romani, Aldo

AU - Wang, Ningning

AU - Roy, Saibal

AU - Hayes, Michael

AU - Paganelli, Rudi P.

AU - Tartagni, Marco

PY - 2014

Y1 - 2014

N2 - This paper presents the design of a 1 : 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm2 footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).

AB - This paper presents the design of a 1 : 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm2 footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).

KW - Bonding

KW - Harvesting

KW - Inductors

KW - Integrated

KW - Low-temperature co-fired ceramic

KW - LTCC

KW - Magnetics

KW - Silicon

KW - Toroidal

KW - Transformers

UR - https://www.scopus.com/pages/publications/84923346430

U2 - 10.1016/j.proeng.2014.11.597

DO - 10.1016/j.proeng.2014.11.597

M3 - Article

AN - SCOPUS:84923346430

SN - 1877-7058

VL - 87

SP - 1557

EP - 1560

JO - Procedia Engineering

JF - Procedia Engineering

T2 - 28th European Conference on Solid-State Transducers, EUROSENSORS 2014

Y2 - 7 September 2014 through 10 September 2014

ER -

Design and fabrication of a 29 μH bondwire micro-transformer with LTCC magnetic core on silicon for energy harvesting applications

Abstract

Keywords

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