Laser direct writing of gold to repair defective lines in thin-film metallizations

Large-area graphene thin films are prized in flexible and transparent devices. We report on a type of glassy graphene that is in an intermediate state between glassy carbon and graphene and that has high crystallinity but curly lattice planes. A polymer-assisted approach is introduced to grow an ultra-smooth (roughness, <0.7 nm) glassy graphene thin film at the inch scale. Owing to the advantages inherited by the glassy graphene thin film from graphene and glassy carbon, the glassy graphene thin film exhibits conductivity, transparency, and flexibility comparable to those of graphene, as well as glassy carbon–like mechanical and chemical stability. Moreover, glassy graphene–based circuits are fabricated using a laser direct writing approach. The circuits are transferred to flexible substrates and are shown to perform reliably. The glassy graphene thin film should stimulate the application of flexible transparent conductive materials in integrated circuits.

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Two-photon nanolithography of positive photoresist thin film with ultrafast laser direct writing

Applied Physics Letters ◽

10.1063/1.4807678 ◽

2013 ◽

Vol 102 (20) ◽

pp. 201108 ◽

Cited By ~ 21

Author(s):

Hong-Zhong Cao ◽

Mei-Ling Zheng ◽

Xian-Zi Dong ◽

Feng Jin ◽

Zhen-Sheng Zhao ◽

...

Keyword(s):

Thin Film ◽

Ultrafast Laser ◽

Direct Writing ◽

Laser Direct Writing ◽

Positive Photoresist ◽

Two Photon

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Laser Surface Modification for Copper Deposition on Polyimide

MRS Proceedings ◽

10.1557/proc-129-579 ◽

1988 ◽

Vol 129 ◽

Cited By ~ 6

Author(s):

Y.S. Liu ◽

H.S. Cole

Keyword(s):

Thin Film ◽

High Speed ◽

High Sensitivity ◽

Thin Film Deposition ◽

Film Deposition ◽

Direct Writing ◽

Laser Direct Writing ◽

Laser Surface Modification ◽

Deposition Processes ◽

Surface Modified

ABSTRACTSelective modification of surface reactivities with lasers, using either direct writing or projection method, is intrinsically a sensitive method to prepare a surface for highresolution and high-speed area selective thin film deposition. In this paper, we demonstrated the use of laser direct-writing and projection patterning techniques for selective modification of the electrochemical property of a polyimide surface. High quality and highresolution copper patterns on polyimide surfaces are produced when the surface-modified sample is subsequently placed in an electroless plating solution. These results demonstrated that the use of laser-selective-modification of surface properties in conjunction with other batch thin film deposition processes provides an attractive approach for area-selective metallization for a variety of applications in which high writing speed and high sensitivity are required.

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Laser-induced orientation transformation of a conjugated polymer thin film with enhanced vertical charge transport

Journal of Materials Chemistry C ◽

10.1039/c8tc02393j ◽

2018 ◽

Vol 6 (35) ◽

pp. 9374-9382 ◽

Cited By ~ 5

Author(s):

Sangmin Chae ◽

Ahra Yi ◽

Hyun Hwi Lee ◽

Jiyeon Choi ◽

Hyo Jung Kim

Keyword(s):

Thin Film ◽

Electrical Properties ◽

Charge Transport ◽

Efficient Method ◽

Conjugated Polymer ◽

Direct Writing ◽

Laser Direct Writing ◽

Polymer Thin Film

An efficient method which enables one to transform the orientation and enhance the electrical properties of a conjugated polymer thin film is proposed via laser direct writing.

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