Improvements of the Epoxy-Copper Adhesion for Microelectronic Applications

被引：27

作者：

Granado, Lerys ^{[1
,2
,3
]}

Kempa, Stefan ^{[1
]}

Gregoriades, Laurence John ^{[1
]}

Bruening, Frank ^{[1
]}

Bernhard, Tobias ^{[1
]}

Flaud, Valerie ^{[3
]}

Anglaret, Eric ^{[2
]}

Frety, Nicole ^{[3
]}

机构：

[1] Atotech Deutschland GmbH, Erasmusstr 20, D-10553 Berlin, Germany

[2] Univ Montpellier, CNRS, L2C, Montpellier, France

[3] Univ Montpellier, CNRS, ICGM, Montpellier, France

来源：

ACS APPLIED ELECTRONIC MATERIALS | 2019年 / 1卷 / 08期

关键词：

microelectronics; curing; wet treatment; polymer-metal adhesion; surface analyses; WET CHEMICAL TREATMENTS; SURFACE MODIFICATION; POLYMER LAYERS; BUILDUP LAYERS; PEEL STRENGTH; THIN-FILM; RESIN; ROUGHNESS; PROPERTY; METALLIZATION;

D O I：

10.1021/acsaelm.9b00290

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：

Upcoming electronic devices are required to be further miniaturized. The microelectronics industry and packaging technology focus efforts on optimizing adhesion between plated copper and printed circuit board (PCB) substrate (here epoxy/glass buildup composite), while keeping smooth surfaces for high-frequency application. We propose herein to review and deepen the basic understanding of the sequential buildup process employed worldwide for the past several decades for multilayered PCB manufacturing. This multiscale and interdisciplinary study aims to establish the relationships between degrees of precuring (alpha), oxidative etching (permanganate desmear wet treatment), and copper adhesion. The epoxy curing states on industrial coupons were evaluated by diffuse-reflectance infrared Fourier transform spectroscopy. Then, atomic force microscopy (AFM) described the desmear performances through topography evolution with alpha between the different sequence steps. Finally, polymer-copper adhesions were investigated by using peel strength tests, AFM, and X-ray photoemission spectroscopy. We remark that high adhesion strengths were obtained for very smooth surfaces. This study outlines the contribution of the polymer network viscoelasticity (relaxation dynamic) on the polymer-copper adhesion. We observed that faster polymer relaxation rates tended to increase polymer-copper adhesions.

引用

页码：1498 / 1505

页数：15

共 52 条

[1]

Angstenberger A., 1994, Circuit World, V20, P8, DOI 10.1108/eb046269

[2] Adhesion of polymers [J].