Exhibition Report of 29th FINETECH JAPAN

1. Ink for electromagnetic wave shield that contributes to cost reduction, lighter weight and thinner shape

1. Structure of Ink for Electromagnetic Wave Shield

Electromagnetic wave shield ink is an ink that has both a conductive function and screen printing suitability. By printing this ink in an optimal circuit pattern on the housing, etc., according to the internal structure of the electronic equipment, it is possible to reduce leakage of internally generated electromagnetic waves and penetration of externally generated electromagnetic waves.

2. Comparison of Electromagnetic wave shield and other shield technologies

The comparison between ink for electromagnetic wave shield and other technologies is as follows. In particular, it is superior in cost reduction, thinner and lighter products

3. Application of Ink for Electromagnetic Shield to Display

Ink for electromagnetic wave shield can achieve both light transmittance and electromagnetic wave shielding function by devising printing patterns (see above). This makes it possible to replace mesh-type electromagnetic wave shielding films used in places where light transmission is required, such as displays. Replacing film with printing will help reduce manufacturing costs and make displays thinner and lighter.

Example of pattern printing of electromagnetic wave shield ink on a panel printed with smoke clear

2. Introduction of Black matrix ink that contributes to significant cost reduction

1. Black Matrix by screen printing

Black matrix ink is an ink that replaces the black matrix manufactured by photolithography with screen printing. Substitution is possible if the line width is 100 µm or more. (A smaller line width is also possible depending on the conditions. Please consult us.)

Example of Black Matrix printing (Narrow width: 100µm, Substrate: glass)

Enlarged photo of above black matrix

2. Comparison of Black matrix ink with other technologies

Comparison of Black matrix ink with other technologies is as follows. Black matrix inks are not as good as photolithography in terms of the line width that can be achieved, but they can greatly contribute to process simplification and cost reduction as long as substitution is possible.

3. Introduction of Ink for sensor (IR transmittable ink) that realizes seamless design

1. Structure of Ink for sensor (IR transmittable ink)

Ink for sensor (IR transmittable ink) transmits only the light of the wavelength that the sensor wants to detect (infrared light in the case of a fingerprint authentication sensor) out of the light applied to the printed ink layer, blocks other light (visible light and ultraviolet light) that may cause malfunctions. With ink for sensor, it is possible to simultaneously improve the freedom of design using various colors and the accuracy of the sensing function.

Structure to use ink for sensor (IR transmittable ink) for fingerprint authentication sensor

2. Seamless design by Ink for sensor

When sensor ink is applied to the fingerprint authentication sensor, the light-receiving part of the IR sensor that detects fingerprints can be decorated in the same way as the housing, allowing seamless design without interruption. It is also possible to add an IR transmission function to glittering pearl ink.

Example of seamless design with IR receiving part of fingerprint authentication sensor and housing (red circle)

4. Introducing a new design with movement by concealing printing

1. Concealing Printing that control transmission of visible light

Concealing printing is an ink that set to transmit light wavelengths in the visible light range. This is a printing method that express a design that was not imagined before the backlight was illuminated.

(1) Surface: Matt clear layer (2) PC substrate (3) Back: 1st layer: IR Transmittable Ink (4) Back: 2nd layer: Black outline printing

(1) Printing (2) Forming (3) Backlight irradiation (Characters appear!)

2. Example of applying concealing printing to design

Combination with concealable ink makes it possible to apply to unexpected designs, warning light and other decorations with message.

The impression changes greatly between normal (upper photo) and backlight irradiation (lower photo). (Left is high opacity black ink)

5. Realize high-grade image by highly accurate printing. Introducing High Definition Ink system (High Quality/High Definition screen ink)

1. 7 benefits of High Definition Ink system (High Quality/High Definition screen ink)

High-Definition Ink possess seven benefits, such as reduced printing processes and improved workability, as well as fine printability.

2. Provide high grade image by fine printability

Fine printability of this High Definition Ink enables luxurious feeling design that has not ever been realized.

A luxurious modern design combining High Definition Ink and mirror ink (base material: glass, line width 100µm)

3. New expression by application of fine printability

The fine printability of High Definition Ink can express a new texture never seen before by applying it to three-dimensional printing.

Example of 3D design by High Definition Ink

6. Introducing decorative technology to curved glass

Application to curved display glass

Glass display for smartphone have come to use curved surfaces to improve portability and design. In conventional screen printing technology, printing on curved surfaces had been difficult, but it has become possible to apply pad printing and print on curved surfaces using a screen printer that supports curved surfaces.

Example of glass window frame printing using a curved surface for the window frame

Example of wide color variation

7. Functional Black Ink(1): Introducing Piano Black Ink

1. Comparison with ordinary black ink by color measurement value (SCE, Specular Component Exclude Method)

Piano Black Ink (Jet Black Ink) expresses deeper black color than ordinary black ink. Even with the SCE (Specular Component Exclude) method measurement, jet blackness with a brightness L value of 0.70 with 1.0 or less is realized.

2. Piano black ink that produces a sense of high grade quality

Piano black ink expresses deep black that ordinary black ink cannot express. This deep black color contributes to the elegance and luxury of the product like a lacquered luxury product.

Black depth of piano black ink (left) clarified by light irradiation (right is normal black ink)

Functional Ink Black (2): Introduction of ink for glass (GIZ-HF) with excellent post processing

1. Excellent post processing due to high resistance to Glue (resistance to adhesive agent, double sided tape)

GIZ-HF is a screen ink for glass that possess high glue resistance (resistance to adhesive agent, double sided tape). This high glue resistance contributes to the improvement of quality of post processing such as bonding process using decorated glass adhesive agent.

Printed ink layer of GIZ-HF that is not affected by component of adhesive agent and double sided tape (left) and printed ink layer of ordinary ink that is affected by (right).

2. High Dyne value prevents cissing on printed ink layer

GIZ-HF 939 NC Black raised dyne value related to surface tension from about 35 to more than 42. This high dyne value solves the problem of cissing at the overcoating process after printing.

Printed ink layer of GIZ-HF939 NC BLACK that does not repel marks painted with a pen (left) and normal printed ink layer that repels (right)

8. Introduction of clear for display contributes to improvement of visibility

Clear with freely adjustable optical properties (glossiness・transmittance)

Clear for display can freely adjust the gloss value, which is the glossiness that reflects external light, and the haze value, which is the light transmittance. The ability to set freely these optical characteristics enables anti-glare (anti-reflection) and transparency settings according to the display usage environment, and greatly contributes to improvement of visibility.

Example of printing clear on display (From left, Gloss value 5, 10, 20.)

 

9. Contributes to light weight and cost reduction of Display. Introduction of FIM (Film Insert Molding)

1. FIM (Film Insert Molding)

FIM (Film Insert Molding) is a method of creating a product by integrating a pre-designed thermoplastic resin film with a molding resin material.

(1) Screen Printing (2) Forming (3) Injection

(a) Resin sheet (b) Ink layer (c) Binder layer (d) Molding resin

2. Realization of weight reduction and cost reduction by replacing glass

By using FIM technology, it is possible to convert display panels from glass to resin and reduce the weight. Also, since the decoration process of FIM is simpler than the glass decoration and assembly process, significant cost reductions can be expected.

Display integrated with housing using FIM technology (realizes rounded corners)