UV-curable positive photoresists for screen printing plate

Shirai, Masamitsu; Okamura, Hitoshi

doi:10.1002/pi.5065

Cited by 15 publications

(6 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photopolymerization is a well-established processing technique in the fields of protective and decorative coatings for wood, cardboard, paper, plastic, metal, or ceramics, but it has recently gained popularity in more advanced areas, such as microelectronics, , optical materials, biomedical applications, , and 3D-printing . As photopolymerization has progressed in the past decades, researchers are dealing with a number of different analytical techniques when performing kinetic studies on a UV-curable coating .…”

Section: Introductionmentioning

confidence: 99%

Real Time-NIR/MIR-Photorheology: A Versatile Tool for the in Situ Characterization of Photopolymerization Reactions

et al. 2017

View full text Add to dashboard Cite

In photopolymerization reactions, mostly multifunctional monomers are employed, as they ensure fast reaction times and good final mechanical properties of the cured materials. Drawing conclusions about the influence of the components and curing conditions on the mechanical properties of the subsequently formed insoluble networks is challenging. Therefore, an in situ observation of chemical and mechanical characteristics during the photopolymerization reaction is desired. By coupling of an infrared spectrometer with a photorheometer, a broad spectrum of different photopolymerizable formulations can be analyzed during the curing reaction. The rheological information (i.e., time to gelation, final modulus, shrinkage force) can be derived from a parallel plate rheometer equipped with a UV- and IR-translucent window (glass for NIR and CaF window for MIR). Chemical information (i.e., conversion at the gel point and final conversion) is gained by monitoring the decrease of the corresponding IR-peak for the reactive monomer unit (e.g., C═C double bond peak for (meth)acrylates, H-S thiol and C═C double bond peak in thiol-ene systems, C-O epoxy peak for epoxy resins). Depending on the relative concentration of reactive functional groups in the sample volume and the intensity of the IR signal, the conversion can be monitored in the near-infrared region (e.g., acrylate double bonds, epoxy groups) or the MIR region (e.g., thiol signal). Moreover, an integrated Peltier element and external heating hood enable the characterization of photopolymerization reactions at elevated temperatures, which also widens the window of application to resins that are waxy or solid at ambient conditions. By switching from water to heavy water, the chemical conversion during photopolymerization of hydrogel precursor formulations can also be examined. Moreover, this device could also represent an analytical tool for a variety of thermally and redox initiated systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Real Time-NIR/MIR-Photorheology: A Versatile Tool for the in Situ Characterization of Photopolymerization Reactions

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The pencil hardness of printed patterns was evaluated according to ASTM D3359 [ 49 ]. The hardness of the printed pattern was measured by the trolley method.…”

Section: Resultsmentioning

confidence: 99%

Design and Synthesis of Functional Silane-Based Silicone Resin and Application in Low-Temperature Curing Silver Conductive Inks

et al. 2023

View full text Add to dashboard Cite

In the field of flexible electronics manufacturing, inkjet printing technology is a research hotspot, and it is key to developing low-temperature curing conductive inks that meet printing requirements and have suitable functions. Herein, methylphenylamino silicon oil (N75) and epoxy-modified silicon oil (SE35) were successfully synthesized through functional silicon monomers, and they were used to prepare silicone resin 1030H with nano SiO2. 1030H silicone resin was used as the resin binder for silver conductive ink. The silver conductive ink we prepared with 1030H has good dispersion performance with a particle size of 50–100 nm, as well as good storage stability and excellent adhesion. Additionally, the printing performance and conductivity of the silver conductive ink prepared with n,n-dimethylformamide (DMF): proprylene glycol monomethyl ether (PM) (1:1) as solvent are better than those of the silver conductive ink prepared by DMF and PM solvent. Cured at a low temperature of 160 °C, the resistivity of 1030H-Ag-82%-3 conductive ink is 6.87 × 10−6 Ω·m, and that of 1030H-Ag-92%-3 conductive ink is 0.564 × 10−6 Ω·m, so the low-temperature curing silver conductive ink has high conductivity. The low-temperature curing silver conductive ink we prepared meets the printing requirements and has potential for practical applications.

show abstract

“…In that case, under irradiation, exposed regions of photosensitive material are removed during development. Typically, positive resists consist of a polymer matrix with protected functionalities, small molecular photoactive generator, solvent, and other additives [134,135]. One of the most Figure 8: Structural formula of polydimethylsiloxane oligomer (PDMS).…”

Section: Common Photopolymersmentioning

confidence: 99%

“…Generally, polymers having tertiary carboxylate, tertiary carbonate, tertiary ether, acetal, hemiacetal ester, or other easily protonizable group are used in positive tone resist systems. In that case, after the photoactivated acid-catalyzed reactions, such polymers are decomposed into poly-carboxylic acids or poly-phenols [134], depending on the initial functional group, and the smaller molecular weight having nonpolymeric compounds. Thereafter, polymers having acidic functional groups can easily dissolve in an alkaline solvent.…”

mentioning

confidence: 99%

Polymers for Regenerative Medicine Structures Made via Multiphoton 3D Lithography

Merkininkaitė

Gailevičius

Šakirzanovas

et al. 2019

International Journal of Polymer Science

View full text Add to dashboard Cite

Multiphoton 3D lithography is becoming a tool of choice in a wide variety of fields. Regenerative medicine is one of them. Its true 3D structuring capabilities beyond diffraction can be exploited to produce structures with diverse functionality. Furthermore, these objects can be produced from unique materials allowing expanded performance. Here, we review current trends in this research area. We pay particular attention to the interplay between the technology and materials used. Thus, we extensively discuss undergoing light-matter interactions and peculiarities of setups needed to induce it. Then, we continue with the most popular resins, photoinitiators, and general material functionalization, with emphasis on their potential usage in regenerative medicine. Furthermore, we provide extensive discussion of current advances in the field as well as prospects showing how the correct choice of the polymer can play a vital role in the structure’s functionality. Overall, this review highlights the interplay between the structure’s architecture and material choice when trying to achieve the maximum result in the field of regenerative medicine.

show abstract

UV-curable positive photoresists for screen printing plate

Cited by 15 publications

References 56 publications

Real Time-NIR/MIR-Photorheology: A Versatile Tool for the in Situ Characterization of Photopolymerization Reactions

Real Time-NIR/MIR-Photorheology: A Versatile Tool for the in Situ Characterization of Photopolymerization Reactions

Design and Synthesis of Functional Silane-Based Silicone Resin and Application in Low-Temperature Curing Silver Conductive Inks

Polymers for Regenerative Medicine Structures Made via Multiphoton 3D Lithography

Contact Info

Product

Resources

About