WO2008015958A1 - Tête d'impression thermique - Google Patents
Tête d'impression thermique Download PDFInfo
- Publication number
- WO2008015958A1 WO2008015958A1 PCT/JP2007/064663 JP2007064663W WO2008015958A1 WO 2008015958 A1 WO2008015958 A1 WO 2008015958A1 JP 2007064663 W JP2007064663 W JP 2007064663W WO 2008015958 A1 WO2008015958 A1 WO 2008015958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermal conductivity
- layer
- print head
- heating resistor
- protective film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/3351—Electrode layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/33515—Heater layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/33525—Passivation layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/3353—Protective layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33555—Structure of thermal heads characterised by type
- B41J2/3357—Surface type resistors
Definitions
- the present invention relates to a thermal print head incorporated in a thermal printer.
- a thermal print head has an insulating substrate and a heating resistor formed on the substrate. At the time of printing, images and characters are formed on a recording medium such as thermal paper by energizing the heating resistor (see, for example, Patent Document 1 below).
- FIG. 5 is a partial cross-sectional view showing an example of a conventional thermal print head.
- the thermal print head X shown in the figure includes a substrate 91 and a partial glaze 92 that is elongated in the main scanning direction.
- a plurality of electrodes 93 extending in the sub-scanning direction are provided on the substrate 91 .
- a heating resistor 94 extending across the electrodes 93 is formed! /.
- a protective film 95 for protecting the heating resistor 94 and other members is formed on the substrate 91.
- the thermal paper is sent in the sub-scanning direction while being pressed against the protective film 95.
- the protective film 95 As a technique for increasing the printing speed, for example, it is conceivable to form the protective film 95 with a material having high thermal conductivity. According to this configuration, the temperature of the thermal paper can be increased and decreased quickly, which is expected to contribute to an improvement in printing speed.
- an object of the present invention is to provide a thermal print head capable of suppressing the sticking phenomenon while maintaining an appropriate printing speed.
- a thermal print head provided by the present invention includes a substrate, a heating resistor supported by the substrate, an electrode for energizing the heating resistor, a protective film covering the heating resistor, Is provided.
- the protective film includes a high thermal conductivity portion and a low thermal conductivity portion having a lower thermal conductivity than the high thermal conductivity portion. The low thermal conductivity part is provided farther from the heating resistor than the high thermal conductivity part.
- the overall heat transfer coefficient of the protective film can be adjusted by appropriately setting the thickness of the high thermal conductivity portion and the thickness of the low thermal conductivity portion.
- the degree of temperature rise and temperature drop in a recording medium such as thermal paper, and as a result, the sticking phenomenon can be suppressed without unduly reducing the printing speed.
- the protective film includes a high thermal conductivity layer and a low thermal conductivity layer laminated on the high thermal conductivity layer.
- the low thermal conductivity layer is made of a material having a thermal conductivity lower than that of the high thermal conductivity layer.
- the low thermal conductivity layer is provided farther from the heating resistor than the high thermal conductivity layer.
- the high thermal conductivity layer is made of any one of SiC, SiN, and sialon, and the low thermal conductivity layer is made of TaN.
- the protective film has a configuration in which the thermal conductivity decreases as the distance from the heating resistor increases in the thickness direction.
- FIG. 1 is a cross-sectional view showing a main part of a thermal print head according to a first embodiment of the present invention.
- 2] A plan view showing the main part of the thermal print head of the first embodiment.
- 3] A cross-sectional view showing the main part of the thermal print head according to the second embodiment of the present invention. 4] The thickness direction position and heat conduction of the protective film in the thermal print head of the second embodiment.
- FIG. 5 is a cross-sectional view showing a main part of a conventional thermal print head.
- FIG. 1 and FIG. 2 show a thermal print head according to a first embodiment of the present invention.
- the illustrated thermal print head A1 includes a substrate 1, an electrode pattern 2, a heating resistor 3, a glass layer 4, and a protective film 5. In FIG. 2, only the electrode pattern 2 and the heating resistor 3 are shown!
- the substrate 1 is an insulating substrate having a rectangular shape in plan view extending in the main scanning direction, and is made of, for example, alumina ceramic.
- a partial glaze 11 is formed on the upper surface of the substrate 1.
- the partial dull 11 is a strip extending in the main scanning direction. As understood from the cross-sectional view of FIG. 1, the partial glaze 11 bulges in the thickness direction of the substrate 1.
- the electrode pattern 2 is for energizing the heating resistor 3 and includes a common electrode 21 and a plurality of individual electrodes 22 as shown in FIG.
- the common electrode 21 includes a strip-shaped portion extending in the main scanning direction and a plurality of comb-tooth portions extending in the sub-scanning direction.
- the plurality of individual electrodes 22 have their tip portions arranged alternately along the main scanning direction with the plurality of comb-tooth portions.
- the electrode pattern 2 is formed, for example, by printing a resinate Au paste after thick film printing.
- the heating resistor 3 is a heat source of the thermal print head A1.
- the heating resistor 3 has a strip shape extending in the main scanning direction, and traverses each comb-tooth portion of the common electrode 21 and the tip portion of each individual electrode 22. When energized through the common electrode 21 and any selected individual electrode 22, a portion of the heating resistor 3 generates heat.
- the heating resistor 3 is formed, for example, by printing a thick film of a ruthenium oxide paste and firing the applied paste.
- the glass layer 4 covers the partial glaze 11, the electrode pattern 2, and the exothermic antibody 3.
- the glass layer 4 is formed, for example, by printing a thick film of glass paste and firing the applied paste. In this embodiment, the thickness of the glass layer 4 is about 6.0 m.
- the protective film 5 is formed on the glass layer 4 and covers the heating resistor 3 via the glass layer 4.
- the protective layer 5 includes a first layer 51 having a high thermal conductivity, a second layer 52 having a low thermal conductivity, and a third layer 53 made of a hard material.
- the first layer 51 is made of SiC and has a thickness of about 3.0 m.
- the second layer 52 is a layer whose thermal conductivity is lower than that of the first layer 51.
- the second layer 52 is made of TaN, for example, and has a thickness of about 0.8 111.
- the third layer 53 is made of, for example, conductive sialon and has a thickness of about 0.2 m.
- the third layer 53 is a relatively thin layer made of a very hard material and will not be damaged by contact with the thermal paper.
- the first layer 51, the second layer 52, and the third layer 53 are formed by sputtering, for example.
- the degree of temperature rise and temperature drop of a recording medium such as thermal paper can be appropriately adjusted. That is, the overall heat transfer coefficient of the entire protective film 5 is determined by the thermal conductivity and thickness of the first layer 51, the second layer 52, and the third layer 53.
- the first layer 51 having a relatively large thickness and the second layer 52 having a low thermal conductivity are large factors that determine the overall heat transfer coefficient. Therefore, it is possible to adjust the overall heat transfer coefficient by appropriately setting the thicknesses of the first layer 51 and the second layer 52. For example, the overall heat transfer coefficient can be increased as the thickness of the first layer 51 is increased.
- the present embodiment by setting the thicknesses of the first layer 51 and the second layer 52 to the appropriate thicknesses described above, it is possible to suppress the sticking phenomenon without unduly reducing the printing speed.
- the second layer 52 made of TaN is suitable for suppressing the sticking phenomenon.
- FIG. 3 shows a thermal print head A2 according to the second embodiment of the present invention.
- the multi-print head A2 is different from the thermal print head Al described above in the structure of the protective film 5.
- the same or similar elements as those in the first embodiment are denoted by the same reference numerals.
- the protective film 5 of the thermal print head A2 is formed as a single-layer film made of, for example, SiC.
- the protective film 5 has a thickness t5 of about 4.0 m.
- the thickness direction position and the thermal conductivity are in the relationship shown in FIG.
- the vertical axis in FIG. 4 indicates the position t in the protective layer 5 in the thickness direction (upward in FIG. 3), and the value of t increases as the heating resistor 3 moves away.
- the portion of the protective film 5 closest to the heating resistor 3 is a portion having a relatively high thermal conductivity ⁇ (high thermal conductivity portion). Meanwhile, protective film
- the portion of 5 farthest from the heating resistor 3 has a relatively low thermal conductivity ⁇ ( ⁇ ⁇
- the protective film 5 (Low thermal conductivity part).
- the thickness direction position and the thermal conductivity have a linear relationship.
- the protective film 5 having such a configuration can be formed by, for example, forming force by gradually increasing the gas pressure from the formation start time to the formation completion time by using sputtering.
- the degree of temperature rise and drop of the thermal paper can be appropriately adjusted, and the same technical effect as the first embodiment can be achieved. Also, since the protective film 5 is formed as a single layer, the integrity of the protective film is maintained, so that there is no problem that a part of the protective film 5 is peeled off.
Landscapes
- Electronic Switches (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007800289734A CN101500813B (zh) | 2006-08-04 | 2007-07-26 | 热打印头 |
| EP07791363A EP2052867A1 (en) | 2006-08-04 | 2007-07-26 | Thermal print head |
| US12/376,384 US7969458B2 (en) | 2006-08-04 | 2007-07-26 | Thermal printhead |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-212851 | 2006-08-04 | ||
| JP2006212851A JP4584882B2 (ja) | 2006-08-04 | 2006-08-04 | 厚膜サーマルプリントヘッド |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008015958A1 true WO2008015958A1 (fr) | 2008-02-07 |
Family
ID=38997137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/064663 Ceased WO2008015958A1 (fr) | 2006-08-04 | 2007-07-26 | Tête d'impression thermique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7969458B2 (ja) |
| EP (1) | EP2052867A1 (ja) |
| JP (1) | JP4584882B2 (ja) |
| CN (1) | CN101500813B (ja) |
| WO (1) | WO2008015958A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011083923A (ja) * | 2009-10-14 | 2011-04-28 | Aoi Electronics Co Ltd | サーマルヘッド |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5825778B2 (ja) * | 2010-12-10 | 2015-12-02 | ローム株式会社 | サーマルプリントヘッド |
| CN104401135B (zh) * | 2014-12-04 | 2016-11-23 | 山东华菱电子股份有限公司 | 热敏打印头 |
| CN104527231B (zh) * | 2014-12-31 | 2016-10-19 | 山东华菱电子股份有限公司 | 自动去除积碳的热敏打印头及制作方法 |
| CN104512121B (zh) * | 2014-12-31 | 2016-09-14 | 山东华菱电子股份有限公司 | 一种自动去除积碳的热敏打印头及制作方法 |
| CN112297646B (zh) * | 2020-11-17 | 2022-07-05 | 山东华菱电子股份有限公司 | 一种薄膜热敏打印头用发热基板的制造方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6262775A (ja) * | 1985-09-13 | 1987-03-19 | Seiko Epson Corp | サ−マルヘツド |
| JPH01244870A (ja) * | 1988-03-28 | 1989-09-29 | Nikon Corp | サーマルヘッド |
| JP2006001017A (ja) * | 2004-06-15 | 2006-01-05 | Rohm Co Ltd | サーマルヘッドの製造方法およびサーマルヘッド |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099257A (en) * | 1989-05-10 | 1992-03-24 | Matsushita Electric Industrial Co., Ltd. | Thermal head with an improved protective layer and a thermal transfer recording system using the same |
| US5157414A (en) * | 1989-09-08 | 1992-10-20 | Hitachi, Ltd. | Thick film type thermal head and thermal recording device |
| US6441840B1 (en) | 2000-06-19 | 2002-08-27 | Rohm Co., Ltd. | Thick-film thermal printhead with improved paper transfer properties |
| JP2002002005A (ja) | 2000-06-19 | 2002-01-08 | Rohm Co Ltd | 厚膜型サーマルプリントヘッド |
-
2006
- 2006-08-04 JP JP2006212851A patent/JP4584882B2/ja not_active Expired - Fee Related
-
2007
- 2007-07-26 CN CN2007800289734A patent/CN101500813B/zh not_active Expired - Fee Related
- 2007-07-26 WO PCT/JP2007/064663 patent/WO2008015958A1/ja not_active Ceased
- 2007-07-26 US US12/376,384 patent/US7969458B2/en active Active
- 2007-07-26 EP EP07791363A patent/EP2052867A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6262775A (ja) * | 1985-09-13 | 1987-03-19 | Seiko Epson Corp | サ−マルヘツド |
| JPH01244870A (ja) * | 1988-03-28 | 1989-09-29 | Nikon Corp | サーマルヘッド |
| JP2006001017A (ja) * | 2004-06-15 | 2006-01-05 | Rohm Co Ltd | サーマルヘッドの製造方法およびサーマルヘッド |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011083923A (ja) * | 2009-10-14 | 2011-04-28 | Aoi Electronics Co Ltd | サーマルヘッド |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100289862A1 (en) | 2010-11-18 |
| EP2052867A1 (en) | 2009-04-29 |
| JP4584882B2 (ja) | 2010-11-24 |
| JP2008036923A (ja) | 2008-02-21 |
| CN101500813A (zh) | 2009-08-05 |
| US7969458B2 (en) | 2011-06-28 |
| CN101500813B (zh) | 2012-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6371529B2 (ja) | サーマルプリントヘッド、サーマルプリンタ | |
| CN1990259B (zh) | 加热电阻元件、包括该元件的装置以及该元件的制造方法 | |
| CN101652252B (zh) | 热打印头 | |
| CN1090568C (zh) | 热打印头 | |
| CN101636275B (zh) | 热打印头 | |
| US7969458B2 (en) | Thermal printhead | |
| US8031215B2 (en) | Thermal head, thermal printer and manufacturing method of thermal head | |
| JP3868755B2 (ja) | サーマルヘッド及びその製造方法 | |
| US7876343B2 (en) | Thermal print head and method for manufacturing same | |
| JP2002067367A (ja) | サーマルヘッド及びその製造方法 | |
| JP2004155160A (ja) | サーマルヘッド及びその製造方法 | |
| US20090201356A1 (en) | Thermal print head and method for manufacturing the same | |
| JP2011056735A (ja) | サーマルヘッド | |
| JP4557677B2 (ja) | サーマルヘッド及びそれを用いたサーマルプリンタ | |
| JP5670076B2 (ja) | サーマルプリントヘッドおよびその製造方法 | |
| JP4360602B2 (ja) | サーマルヘッドおよびその製造方法、ならびにサーマルプリンタ | |
| JP2007261118A (ja) | サーマルヘッドおよびその製造方法 | |
| JP2002002005A (ja) | 厚膜型サーマルプリントヘッド | |
| JP2015189066A (ja) | サーマルヘッドの製造方法 | |
| JPH0880628A (ja) | サーマルヘッド | |
| JP2008062517A (ja) | サーマルヘッド | |
| JP2002225323A (ja) | サーマルヘッド及びその製造方法 | |
| JP2005212201A (ja) | サーマルヘッド | |
| JP2001301217A (ja) | サーマルプリントヘッド及びその製造方法 | |
| JP2008195013A (ja) | サーマルヘッド |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 200780028973.4 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07791363 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2007791363 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: RU |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 12376384 Country of ref document: US |