Strengths of Murakami

As the world’s top manufacturer that self-develops “screen masks” and “photosensitive materials”

Combination of “screen mask technology” and “photosensitive material technology”

The standards and quality required for a screen mask differ in various ways according to factors such as the standards, types and applications of the products customers make by using screen printing. In addition, the ink, production facility and printing environment that are used vary depending on each customer. In this situation, an advanced technical capability to select the screen and manufacture custom-made screen masks tailored to customers is essential for fully meeting the demands of customers. The key to this capability is the technology to develop photosensitive materials, which is a major component of the screen mask. Ever since our founding, we at Murakami have focused on the development and manufacturing of proprietary photosensitive materials. As a result, we have established our status as a photosensitive material manufacturer that boasts the world’s best ability in terms of performance and production volume. What supports the originality of Murakami is the combination of the two technologies; “screen mask technology” and “photosensitive material technology”, which enable printing in the unit of μm (micrometer).

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Technology development capability Supporting the future of printed electronics with advanced technical capabilities

Taking the lead in the future of printed electronics We support the “miniaturization and diversification of electrical and electronic devices” with our technical capabilities

In recent years, in the IT and electronics industry, the miniaturization (downsizing, weight saving and thinning) of electric and electronic devices have rapidly progressed. At the same time, the diversification of the ink, printing material, printing environment and printing form used by customers has also progressed. As such, in order for mask manufacturers to fulfill their own mission, not only will they need to realize a “merely thin” or “merely compact” printed material, but an important factor will be to prove how they are capable of achieving highly precise and economical production in the printing processes of customers.
Screen masks are made by using a manufacturing method that may look simple at first sight, consisting of a combination of a screen (mesh) and photosensitive material, but the craft is actually very deep. At Murakami, we are capable of providing products that satisfy customers precisely because of our accumulated experience, techniques and know-how.
Take advantage of our knowledge that we have cultivated in the world of μm (micrometers), we will contribute to the further development of the electronics industry.

Example of device formulation by screen printing

Solar cells
Solar cells refer to an energy converter that absorbs the light energy of the sun and then directly changes it into electricity. The solar cells that are produced in the largest volume are the crystalline silicon solar cells. When sunlight strikes the solar cells, electrons (negative) and holes (positive) are generated, and each are drawn to the electrodes in the front and back surfaces, respectively. Screen printing is used for the formation of these electrodes. Screen printing has become an essential technology for manufacturing solar cells at high productivity and low cost.
Touch screens
Although the mainstream of touch screens used to be the resistive type, the spread of smartphones has led to a rapid increase in the capacitive type. Screen printing is an essential technology for the formation of electrodes of this capacitive touch screen. While further thinning is being required in the printing of electrodes in touch screens, technological innovations in recent years have improved the printable scope of screen printing from 100μm, which used to be thought of as the limit, down to 50 to 30μm. The advancement in screen printing technology is making possible for the cost reduction of touch screen manufacturing and its expansion into a wide variety of applications.
Multilayer ceramic chip capacitors
Multilayer ceramic chip capacitors have made significant contributions to smaller and lighter electronic devices as typified by mobile phones and personal computers. The technology that is supporting this multilayer ceramic chip capacitor behind the scenes is screen printing. A multilayer ceramic chip capacitor is made by printing a metallic paste on top of a dielectric sheet using a screen mask, and then by overlaying several hundreds to over one thousand of these on top of each other. The 0603 (0.6 x 0.3mm) size multilayer ceramic chip capacitor, which is mainstream today, is so small that the outward appearance can no longer be seen by the naked eye.

R&D system

R&D CenterR&D Center

Murakami's operations are broadly divided into the following three areas, and each business area is stationed with specialized technical staffs.
At the "R&D Center," we aim to achieve optimal results by implementing the creation of a stimulating work environment through the mutual cooperation of technical staffs who each have their own specialization.

R&D Center

The applications of screen printing are wide ranging, from textile printing to the printing of electric and electronic components.
The materials of a screen mask are comprised of a "frame," "screen mesh" and "photosensitive material," and it is no exaggeration to say that the key factor that determines the reproducibility of a printing is the performance of the photosensitive material.

The mission of the R&D Center is to develop and commercialize photosensitive materials that can obtain optimal printing results in many different fields.

We develop photosensitive materials that meet the needs of customers on a daily basis.

We work on the research and development of high quality photosensitive materials using a variety of analytical laboratory equipment.

Researchers with a high level of expertise will fulfill the needs of customers.

Technology Dept. (Manufacturing Technology, Quality Technology)

In the functional printing for electric and electronic devices, such as solar cells and touch screens that have rapidly grown in recent years, not only will an even thinner and more precise printing be required, but there is an increasing demand for the provision of stable quality.
The Technology Dept. supports Murakami's manufacturing with the two wheels of "manufacturing technology," which works to improve the functionality and process of screen masks, and "quality technology," which aims to achieve stable quality.

We aim to realize an optimal plate specification for a variety of printing objects.

We carry out research so that we can provide even better products through the improvement of the manufacturing process.

Expert staffs respond to customers so that products with even more stable quality can be provided.

Product Technology Dept.

At Murakami, we handle many types of materials and equipment that are necessary for screen printing by leveraging our overseas subsidiary network. In the Product Technology Dept., a wide range of operations is carried out, from the new development of these products to analysis, evaluation and complaint response.
We are striving to enhance our total coordinating capability, so that we can provide printing that is optimal from the standpoint of customers, through a combination of our products and merchandise, as well as items that have been provided by customers.

We scrutinize the valuable opinions and information from customers on a daily basis and using them for the improvement and development of products.

We analyze a variety of products such as screens, squeegees and photosensitive materials to provide optimized products.

We actively carry out an assessment of our plate making and printing that combines Murakami's products and merchandise as well as items provided by customers.

Recipient of the Inoue Harushige Prize

In 1985, Murakami was awarded the 10th Inoue Harushige Prize for having succeeded in "the development and corporatization of PVA-SBQ-type photosensitive resin (photosensitive materials for high precision screen printing)."
At the time, the mainstream photosensitive materials for screen printing were bichromic acid and diazo resin among others, but these photosensitive materials had a short pot life and there was no choice but to sell them in two-part composition. On the other hand, the PVA-SBQ-type photosensitive material had a long pot life, making it possible to provide it to customers in one-part composition, thereby eliminating the hassle to mix the photosensitive material. Furthermore, compared to bichromic acid and diazo resin, it had superior performance such as being able to significantly reduce exposure time, and it was highly acclaimed by screen printing industries around the world as an innovative photosensitive material.

About the Inoue Harushige Prize

The Inoue Harushige Prize was established in 1975 taking example by Harushige Inoue, who was the first secretary of the former Agency of Industrial Science and Technology, in light of his business achievements that contributed to the development of science and technology in Japan, commemorating the 15th anniversary since the founding of the Research Development Corporation of Japan.
Eligible recipients of this award are researchers and companies that have made particularly outstanding achievements for the development of the economy and improvement of public welfare by contributing to the advancement of science and technology in Japan through a technology that has been developed by a company and corporatized based on unique research results of universities, research institutions and the like.

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Global expansion capability We will meet the expectations of globally operating electronics manufacturers

By establishing development and manufacturing facilities near customers, we provide support that extends to resolving issues together as well as implementing mass production

At Murakami, we have had our eyes set on overseas from early on, providing customers in the U.S., Europe and Asian countries with screen masks, photosensitive materials as well as materials and equipment for screen printing. In recent years, we have strengthened our business for electronic parts, solar array panels and touch screens, which require precision and short lead time. By manufacturing and providing screen masks near our customers, we have resolved the diverse issues experienced by customers and honed our global response capabilities to support the implementation of mass production.
To enable customers that have production bases overseas to procure materials as if producing at the plant in their home country--at Murakami we will continue to meet your expectations as your powerful partner that propels your overseas expansion.

Global Network

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