Morphological and Electrical Characterization of Electrically Trimmable Thin-Film Resistors

被引：8

作者：

Privitera, Stefania ^{[1
]}

Le Neel, Olivier ^{[2
]}

Leung, Calvin ^{[2
]}

Dumont-Girard, Pascale ^{[3
]}

Cialdella, Bruno ^{[3
]}

Bongiorno, Corrado ^{[1
]}

Modica, Roberto ^{[4
]}

机构：

[1] CNR, IMM, I-95121 Catania, Italy

[2] STMicroelect Pte Ltd, Ang Mo Kio 569508, Singapore

[3] STMicroelectronics, F-38019 Grenoble, France

[4] STMicroelectronics, R&D Dept, I-95121 Catania, Italy

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2012年 / 59卷 / 12期

关键词：

Electrical trimming; high precision; temperature coefficient of resistance (TCR); thin-film resistors; CR-B; MICROSTRUCTURE; CONDUCTIVITY;

D O I：

10.1109/TED.2012.2219535

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

SiCr-based thin-film resistors with low temperature coefficient of resistance (TCR) have been integrated in a 0.8-mu m BiCMOS technology in a dual thin-film structure, with a heater close to the thin-film resistor. Such a structure allows modifying the thin-film resistance by applying electric pulses to the heater (trimming). The morphology and the electrical properties of the as-deposited and modified thin-film resistors have been studied through transmission electron microscopy analyses and electrical measurements as a function of temperature. Structural analyses have shown the formation of Cr-rich layers at the interfaces. The experimentally observed resistance reduction upon trimming and the TCR variation have been both successfully reproduced by considering the effective medium approximation and by treating the film as a mixture of two materials with different compositions and conductivities.

引用

页码：3549 / 3554

页数：6

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