公开(公告)号：US20240215152A1

公开(公告)日：2024-06-27

申请号：US18031957

申请日：2022-11-14

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Ming LI

IPC: H05K1/02 ,  H05K3/00 ,  H05K3/12 ,  H05K3/46

CPC classification number: H05K1/028 ,  H05K3/0085 ,  H05K3/1275 ,  H05K3/4638 ,  H05K2203/0766 ,  H05K2203/14

Abstract: The present invention discloses a surface tension driven flexible electronics transfer printing method which uses a surfactant liquid membrane or a surfactant bubble as a transfer printing stamp, to realize the transfer printing of an electronic device with nanometer/micron/submillimeter thickness. A process of transfer printing is transparent and visible in a “what you see is what you get” manner to realize the accurate positioning of the electronic device. A local load technology is introduced, which is suitable for arbitrary complex curved substrate to realize diverse transfer printing. The electronic device can be transfer-printed to an application substrate with extremely-low interfacial adhesion, without the requirement for the strong and weak adhesion switching strategy of the traditional transfer printing. An unbearable electronic device membrane can be transfer-printed to an fragile receiving substrate with no loss or low loss, without the introduction of pre-pressure.

公开(公告)号：US20200065447A1

公开(公告)日：2020-02-27

申请号：US16346513

申请日：2018-12-20

Applicant: Dalian University of Technology

Inventor： Yangjun LUO ,  Jian XING ,  Zhan KANG ,  Ming LI

IPC: G06F17/50

Abstract: A method for fixture shape optimization design of a space membrane structure for inhibiting wrinkling, and solves the problem that the space membrane structure is easy to generate a wrinkling phenomenon under the stretching effect of a traditional fixture. By optimizing the shape of the fixture and changing the loading boundary conditions, the minor principal stress of the unit in the membrane region is maximized and the distribution of the principal stress of the membrane is regulated. A global optimization algorithm is used to find a global optimal design, and then novel fixture forms with “arch” and “convex” boundaries are obtained, to achieve the purpose of completely simulating the wrinkling. The present invention not only inhibits the generation of the wrinkling in the membrane, but also avoids cutting the membrane and ensures that the membrane has large enough working area.

公开(公告)号：US20190179985A1

公开(公告)日：2019-06-13

申请号：US16084053

申请日：2017-01-09

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yangjun LUO ,  Zhan KANG ,  Ming LI

IPC: G06F17/50

Abstract: The present invention proposes a design optimization method to prevent wrinkling of stretched membrane structures. It solves the problem of membrane wrinkling in a macro structure or a graphene structure under stretching loads. The membrane material distribution is found using a topology optimization technique that generates a design with curved boundaries or inner holes to eliminate wrinkles. The stress state of a membrane is regulated by restrict the minimum principal stress of each finite-element to a positive value. Such a method guarantees that wrinkling is prevented by accurately designing the shape of boundary and the layout of holes of the membrane. The optimization procedure is highly automated, and the efficiency of the wrinkle-free design for membrane structures can be guaranteed.