Invention Application
- Patent Title: Printable Films for Printed Circuit Boards and Processes for Making Same
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Application No.: US15330844Application Date: 2016-11-07
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Publication No.: US20170135220A1Publication Date: 2017-05-11
- Inventor: Perumal Varun Chadalavada , Daniel Wigdor
- Applicant: THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
- Applicant Address: CA Toronto
- Assignee: THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
- Current Assignee: THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
- Current Assignee Address: CA Toronto
- Main IPC: H05K3/02
- IPC: H05K3/02 ; H05K1/09

Abstract:
Film for use in preparing a printed circuit board (PCB) along with methods for making a PCB and producing a printable film are described herein. The film includes a first layer formed of a radiation-transparent material, a second layer formed of a curable adhesive material, a third layer formed of an electrically conductive material, and optionally, a fourth layer formed of an adhesive and a fifth layer formed of a removable material. Through the adhesive layers, the layers are bonded together to produce the printable film. To produce a PCB, the first layer is covered in ink distributed in a pattern representing the PCB, and the ink-covered film is exposed to radiation until the non-ink-covered portions of the second layer have cured. Then, the fifth layer is removed tearing away the electrically conductive material associated with the non-ink-covered portions of the second layer producing the PCB.
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