Mr. Yunsong Huang Profile

Yunsong Huang

at Soochow Univ

SPIE Involvement:

Author

Publications (3)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 31 August 2021 Paper

Research on femtosecond infrared laser cutting 4H-SiC wafer

Yanfei Shen, Yunsong Huang, Yongdu Li, Qingchun Zhao, Chen Chen, Ming liang Yao

Proceedings Volume 11907, 119070X (2021) https://doi.org/10.1117/12.2602464

Read Abstract +

As a third-generation semiconductor, SiC has the advantages of high band gap, high breakdown field strength, high saturated electron drift speed, and high thermal conductivity. It is used as a substrate material to make power electronic devices. It is widely used in 5G, new energy vehicles, consumer electronics, aerospace and other fields. However, due to the characteristics of hard and brittle and the small thickness of SiC wafer, high-quality cutting is difficult. In this paper, a femtosecond laser with pulse width of 500 fs, center wavelength of 1030 nm, repetition rate of 1 Hz - 40 MHz, and maximum single pulse energy of 200 μJ was used to cut 4H-SiC wafers with a thickness of 360 μm. The ablation experiment was carried out under different pulse energy and ablation time, and the ablation threshold of 4H-SiC at a wavelength of 1030 nm was 268.6 mJ/cm2. The single factor control method was used to research the influence of average power, scanning speed, scanning times, defocusing amounts on cutting depth and taper. The elements of cutting section was analyzed with energy dispersive spectrometer.

Proceedings Article | 2 December 2020 Paper

Research on UV femtosecond pulsed laser cutting carbon fiber composite materials

Yongdu Li, Yanfei Shen, Yunsong Huang, Qingchun Zhao, Chao Lu

Proceedings Volume 11717, 1171726 (2020) https://doi.org/10.1117/12.2587252

Read Abstract +

Carbon fiber reinforced plastic (CFRP) is a key material for lightweighting in aerospace, automotive and other fields. It has the characteristics of anisotropy, high strength, and high hardness. In the processing of CFRP, the use of traditional machining has disadvantages such as severe tool wear, obvious delamination, micro-cracks, and changes in material properties during processing. Laser processing for CFRP provides a non-contact and wear-free processing method. However, it will cause the epoxy resin to generate the heat load, leading to the heat affected zone (HAZ) during the processing. The HAZ is the important indicator of the cutting quality and directly affects the material mechanical properties. Femtosecond pulsed laser with its "cold processing" advantage can greatly reduce the laser's thermal damage to materials and reduce the material's HAZ. In this paper, the cutting process of CFRP by ultraviolet femtosecond pulsed laser is studied. A UV femtosecond laser with a maximum average power of 15W was used to conduct cutting experiments on 2mm thick CFRP. Using the experimental method of single factor analysis, the effect of laser average power, repetition frequency, scanning speed, scanning times, scanning track spacing on cutting quality was studied. The results show that when the average power is 13W, the repetition frequency is 500kHz, the scanning speed is 9m/s and other appropriate process parameters, the width of the HAZ is about 25um.

Proceedings Article | 2 December 2020 Paper

Research on ultraviolet femtosecond pulsed laser cutting 4H-SiC

Yunsong huang, Yongdu Li, Yanfei Shen, Qingchun Zhao, Chen Chen, Chao Lu

Proceedings Volume 11717, 117172D (2020) https://doi.org/10.1117/12.2587288

Read Abstract +

As the most popular semiconductor material, silicon carbide has received extensive attention from the industry. In this study, a UV laser with a center wavelength of 343𝑛𝑚, a pulse width of 500𝑓𝑠, a maximum average power of 12𝑊, and an adjustable repetition rate of 400~500𝑘𝐻𝑧 was used to conduct cutting process experiments on 4H-SiC. A 3D color scanning electron microscope (SEM) and a metallographic microscope are used to observe the cutting section and surface. The effects of laser repetition rate, laser average power, scanning speed and other process parameters on the cutting quality were studied. The ablation threshold of the silicon carbide was obtained to be 44.62𝑚𝐽/𝑐𝑚2. The best cutting result we made is at the condition with the laser average power 2𝑊, the scanning speed 150mm/s, the repetition rate 500kHz, and the scanning number 22 𝑡𝑖𝑚𝑒𝑠. Using a metallurgical microscope, it was observed that the cutting surface was neat, without chipping or cracking, and the thermal effect was negligible. The 3D color SEM image are shown that the taper of the slit was 5.75° and the roughness of the cut section was less than 2.69μm.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years