CN103298266A - Manufacturing method of flexible circuit board of keyboard - Google Patents
Manufacturing method of flexible circuit board of keyboard Download PDFInfo
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- CN103298266A CN103298266A CN2013101594924A CN201310159492A CN103298266A CN 103298266 A CN103298266 A CN 103298266A CN 2013101594924 A CN2013101594924 A CN 2013101594924A CN 201310159492 A CN201310159492 A CN 201310159492A CN 103298266 A CN103298266 A CN 103298266A
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- printed circuit
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Abstract
The invention provides a manufacturing method of a flexible circuit board of a keyboard. The manufacturing method comprises the steps of providing three plastic films used for manufacturing a first flexible circuit board body, a partition board and a second flexible circuit board body; providing silver paste used for printing a first circuit pattern on a first plastic film with the normal technology to manufacture the first flexible circuit board body and manufacturing the partition board with a second plastic film; printing a second circuit pattern on a third plastic film with the silver paste, wherein several areas to be printed with equivalent resistors are reserved on the second circuit pattern; providing electrocondution slurry used for printing the equivalent resistors needed on the areas to be printed with the equivalent resistors on the third plastic film printed with the second circuit pattern and accomplishing the manufacturing of the second flexible circuit board body. According to the manufacturing method of the flexible circuit board of the keyboard, the equivalent resistors are printed by means of the electrocondution slurry and by using the twice printing technology, and therefore the resistance of the equivalent resistors is adjustable and the ghost key phenomenon can be eliminated through the matching of the equivalent resistors and the circuit function.
Description
Technical field
The present invention relates to the computor-keyboard field, relate in particular to a kind of manufacture method of keyboard Flexible Printed Circuit.
Background technology
Keyboard is used for a kind of instruction and data input unit that operating equipment moves; Also refer to the one group of function key (as typewriter, computor-keyboard) through machine of system arrangement operation or equipment.Keyboard is modal computer entry device, and it is widely used on microcomputer and the various terminal equipment.Computer operation person imports various instructions, data by keyboard to computer, the work of command computer.The ruuning situation of computer outputs to display, and the operator can utilize keyboard and display and computer dialog easily, program is made amendment, is edited, the operation of control and observation computer.
Keyboard comes down to the set of one group of key switch.All buttons are detected by Keyboard Control IC, convert the needed signal of host side again to and give system.The connected mode of key switch mainly contains two kinds.A kind of is only mode keystroke interface.Each button of this kind mode is separate, and each button respectively connects an input line, and the button operating state on input line can not influence the operating state on other input lines.Therefore can be easy to judge that by the level state that detects input line which button has been pressed.Independent key mode simplicity of design, but work as number of keys for a long time, will take a lot of input ports of control IC, it is numerous and diverse that circuit also can become.The second way is the matrix keyboard Interface design.This mode is made up of line and alignment, and button is positioned on the crosspoint of row, column, and the row-column configuration of a 4*4 can constitute a keyboard that contains 16 buttons.The matrix of keyboard now commonly used is generally modes such as 8*16,8*18,8*20, and these matrixes can connect button above 120.The judgment mode of this matrix keyboard button is to adopt scanning method, when button is pressed, learns it is which button input thereby Keyboard Control IC judges by the mode of scanning which two line has been communicated with.
But the key-press status of matrix keyboard is interactional.Now randomly draw the matrix of a 2*2 from matrix, can connect four buttons, we are defined as A, B, C, D temporarily.These four buttons are as long as wherein three buttons have been pressed simultaneously, no matter whether the 4th button is pressed, all can be as being pressed, because by other three buttons, the 4th crosspoint has been joined together, and this 4th button industry is referred to as " terrible key "." terrible key " is the problem that matrix keyboard is difficult to avoid, and when three above buttons are pinned simultaneously, is to have dropped on three crosspoints of 2*2 matrix if three buttons are wherein arranged just, the 4th " terrible key " (" terrible Key ") at this moment will occur.To be Keyboard Control IC to the way of " terrible key " shielded this kind input with the mode of software to industry.But all can use combination more than the triple bond in a lot of occasions, at this moment just have to redesign the arrangement mode of key-press matrix at different compound modes, some combinations of needs are not placed in the matrix of any one 2*2, thereby can not be used in combination but can become in the matrix that other key combination will drop on 2*2, cause the limitation of key combination mode, particularly in recreation, use very inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method of keyboard Flexible Printed Circuit, second Flexible Printed Circuit adopts printing technology twice in the manufacture method of this Flexible Printed Circuit, utilize electrocondution slurry to be printed as equivalent resistance, realized the resistance adjustability of equivalent resistance, cooperate circuit function can realize eliminating " terrible key " function well, make that the keyboard that utilizes this method to be made is easy to use.
For achieving the above object, the invention provides a kind of manufacture method of keyboard Flexible Printed Circuit, it may further comprise the steps:
Described first circuit pattern is complete circuit pattern.
The manufacture craft of described step 2 central dividing plate is specially as required place corresponding on second plastic film several contact perforates is set.
The resistance size of the local required equivalent resistance of the equivalent resistance to be printed that described second circuit pattern is provided with is set according to actual needs.
The thickness of printing conductive slurry and width arrange according to the resistance size of required equivalent resistance in the described step 4.
The model of electrocondution slurry is selected for use according to the resistance size of required equivalent resistance in the described step 4.
Described plastic film is polyester film.
Beneficial effect of the present invention: the manufacture method of keyboard Flexible Printed Circuit of the present invention adopts twice printing technology to make Flexible Printed Circuit, wherein, second Flexible Printed Circuit adopts thereon the method for printing conductive slurry to print equivalent resistance, can be by electrocondution slurry and the thickness of adjustment printing conductive slurry and the resistance size that width is regulated equivalent resistance of choosing different model, realize controllability and the controllability of equivalent resistance resistance, cooperate circuit function can avoid the generation of " terrible key " phenomenon well again, make that the keyboard that utilizes this method to be made is easy to use.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention is described in detail, will make technical scheme of the present invention and other beneficial effect apparent.
In the accompanying drawing,
Fig. 1 is the flow chart of the manufacture method of keyboard Flexible Printed Circuit of the present invention;
The structural representation of the Flexible Printed Circuit that Fig. 2 is made for the manufacture method that adopts keyboard Flexible Printed Circuit of the present invention;
Fig. 3 is the part enlarged diagram of Flexible Printed Circuit among Fig. 2.
Embodiment
For further setting forth technological means and the effect thereof that the present invention takes, be described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
See also Fig. 1 and 3, the invention provides a kind of manufacture method of keyboard Flexible Printed Circuit, may further comprise the steps:
Described plastic film is preferably polyester film (PET, Polyethylene terephthalate), and it has good abrasion performance frictional property, dimensional stability and electrical insulating property, can prolong the useful life of product effectively.
As shown in Figure 2, described first circuit pattern 12 is complete, existing circuit pattern, in prior art, utilizes the silver slurry that it is printed onto on first plastic film, forms first Flexible Printed Circuit 10.And the manufacture craft of described space bar is specially as required place corresponding on second plastic film several contact perforates is set, when being assembled into keyboard, described space bar is assembled between first Flexible Printed Circuit 10 and second Flexible Printed Circuit 20, guarantee that first Flexible Printed Circuit 10 and second Flexible Printed Circuit 20 insulate mutually, and the extruding by button on the keyboard and this several contact perforates can make win Flexible Printed Circuit 10 and second Flexible Printed Circuit, 20 correspondence positions be conducted, and finish the input of button.
To on described second circuit pattern 22, the resistance size of the equivalent resistance 24 of the place printing of equivalent resistance 24 to be printed set according to actual needs.
In this step, utilize electrocondution slurry to be printed as equivalent resistance 24 in the place of equivalent resistance 24 to be printed, the thickness of this printing conductive slurry and width arrange according to the resistance size of required equivalent resistance 24; And the model of required electrocondution slurry also is to select for use according to the resistance size of required equivalent resistance 24.The Standard resistance range of described required equivalent resistance 24 is preferably 4.2K-6K.
The different resistance of the place of equivalent resistance 24 to be printed printing resistance on second circuit pattern 22, cooperate circuit function again, can calculate exactly by detecting current and voltage and to supress that several buttons simultaneously, avoid the generation of " terrible key " phenomenon, make that the keyboard that utilizes this method to be made is easy to use.
In sum, the invention provides a kind of manufacture method of keyboard Flexible Printed Circuit, it adopts twice printing technology to make Flexible Printed Circuit, wherein, second Flexible Printed Circuit adopts thereon the method for printing conductive slurry to print equivalent resistance, can be by electrocondution slurry and the thickness of adjustment printing conductive slurry and the resistance size that width is regulated equivalent resistance of choosing different model, realize controllability and the controllability of equivalent resistance resistance, cooperate circuit function can avoid the generation of " terrible key " phenomenon well again, make that the keyboard that utilizes this method to be made is easy to use.
The above for the person of ordinary skill of the art, can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of claim of the present invention.
Claims (7)
1. the manufacture method of a keyboard Flexible Printed Circuit is characterized in that, may further comprise the steps:
Step 1, provide three plastic films, be respectively applied to make first Flexible Printed Circuit, space bar and second Flexible Printed Circuit, described three plastic films are: first to the 3rd plastic film;
Step 2, provide silver slurry, and utilize the silver slurry by normal process at first plastic film printing first circuit pattern, be made into first Flexible Printed Circuit, utilize second plastic film to make space bar according to normal process simultaneously;
Step 3, utilization silver slurry are at the 3rd plastic film printing second circuit pattern, and described second circuit pattern is provided with the place that number is located equivalent resistance to be printed;
Step 4, provide electrocondution slurry, utilize electrocondution slurry to be printed as required equivalent resistance in the place that is printed with equivalent resistance to be printed on the 3rd plastic film of second circuit pattern, finish the making of second Flexible Printed Circuit.
2. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 1 is characterized in that, described first circuit pattern is complete circuit pattern.
3. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 2 is characterized in that, the manufacture craft of described step 2 central dividing plate is specially as required place corresponding on second plastic film several contact perforates are set.
4. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 1 is characterized in that, the resistance size of the local required equivalent resistance of the equivalent resistance to be printed that described second circuit pattern is provided with is set according to actual needs.
5. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 4 is characterized in that, the thickness of printing conductive slurry and width arrange according to the resistance size of required equivalent resistance in the described step 4.
6. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 5 is characterized in that, the model of electrocondution slurry is selected for use according to the resistance size of required equivalent resistance in the described step 4.
7. the manufacture method of keyboard Flexible Printed Circuit as claimed in claim 1 is characterized in that, described plastic film is polyester film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159492.4A CN103298266B (en) | 2013-05-02 | 2013-05-02 | The preparation method of keyboard FPC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310159492.4A CN103298266B (en) | 2013-05-02 | 2013-05-02 | The preparation method of keyboard FPC |
Publications (2)
| Publication Number | Publication Date |
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| CN103298266A true CN103298266A (en) | 2013-09-11 |
| CN103298266B CN103298266B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310159492.4A Expired - Fee Related CN103298266B (en) | 2013-05-02 | 2013-05-02 | The preparation method of keyboard FPC |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876203A (en) * | 2017-03-09 | 2017-06-20 | 联想(北京)有限公司 | A kind of method of keyboard, electronic equipment and manufacture keyboard |
| CN109727804A (en) * | 2017-10-30 | 2019-05-07 | 致伸科技股份有限公司 | Keyboard |
| CN109994334A (en) * | 2017-12-29 | 2019-07-09 | 致伸科技股份有限公司 | Keyboard |
| CN110650579A (en) * | 2018-06-26 | 2020-01-03 | 深圳市璞瑞达薄膜开关技术有限公司 | Radio frequency circuit layer structure and circuit printing method thereof |
| CN110650583A (en) * | 2018-06-26 | 2020-01-03 | 深圳市璞瑞达薄膜开关技术有限公司 | Communication circuit layer structure and circuit printing method thereof |
| CN111031695A (en) * | 2019-12-30 | 2020-04-17 | 广德新三联电子有限公司 | Production process of LED keyboard circuit board |
| CN113035626A (en) * | 2020-12-22 | 2021-06-25 | 贵州航天凯山石油仪器有限公司 | Method for manufacturing ultrathin keyboard on control panel of oil field low-voltage testing instrument |
| CN114816081A (en) * | 2022-04-29 | 2022-07-29 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation scheme |
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| CN1582089A (en) * | 2003-08-05 | 2005-02-16 | 精模电子科技（深圳）有限公司 | Method for manufacturing soft circuit board |
| CN200947202Y (en) * | 2006-04-03 | 2007-09-12 | 新巨企业股份有限公司 | Keyboard capable of canceling ghost key |
| TWM377824U (en) * | 2009-09-18 | 2010-04-01 | Shu-Yuan Zhan | Thin film circuit board structure for keyboard |
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| CN202230928U (en) * | 2011-08-31 | 2012-05-23 | 东莞市博锐自动化科技有限公司 | Keyboard membrane circuit board circuit structure capable of preventing ghost key |
| TW201312941A (en) * | 2011-09-01 | 2013-03-16 | Zippy Tech Corp | Keyboard signal generation circuit |
| US20130093605A1 (en) * | 2011-10-17 | 2013-04-18 | Ching-Te CHEN | Signal generation circuit for keyboards |
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- 2013-05-02 CN CN201310159492.4A patent/CN103298266B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN1582089A (en) * | 2003-08-05 | 2005-02-16 | 精模电子科技（深圳）有限公司 | Method for manufacturing soft circuit board |
| CN200947202Y (en) * | 2006-04-03 | 2007-09-12 | 新巨企业股份有限公司 | Keyboard capable of canceling ghost key |
| TWM377824U (en) * | 2009-09-18 | 2010-04-01 | Shu-Yuan Zhan | Thin film circuit board structure for keyboard |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876203A (en) * | 2017-03-09 | 2017-06-20 | 联想(北京)有限公司 | A kind of method of keyboard, electronic equipment and manufacture keyboard |
| CN109727804A (en) * | 2017-10-30 | 2019-05-07 | 致伸科技股份有限公司 | Keyboard |
| CN109994334A (en) * | 2017-12-29 | 2019-07-09 | 致伸科技股份有限公司 | Keyboard |
| CN109994334B (en) * | 2017-12-29 | 2020-12-04 | 致伸科技股份有限公司 | Keyboard with a keyboard body |
| CN110650579A (en) * | 2018-06-26 | 2020-01-03 | 深圳市璞瑞达薄膜开关技术有限公司 | Radio frequency circuit layer structure and circuit printing method thereof |
| CN110650583A (en) * | 2018-06-26 | 2020-01-03 | 深圳市璞瑞达薄膜开关技术有限公司 | Communication circuit layer structure and circuit printing method thereof |
| CN110650579B (en) * | 2018-06-26 | 2020-11-10 | 深圳市璞瑞达薄膜开关技术有限公司 | Radio frequency circuit layer structure and circuit printing method thereof |
| CN111031695A (en) * | 2019-12-30 | 2020-04-17 | 广德新三联电子有限公司 | Production process of LED keyboard circuit board |
| CN111031695B (en) * | 2019-12-30 | 2021-05-28 | 广德新三联电子有限公司 | Production process of LED keyboard circuit board |
| CN113035626A (en) * | 2020-12-22 | 2021-06-25 | 贵州航天凯山石油仪器有限公司 | Method for manufacturing ultrathin keyboard on control panel of oil field low-voltage testing instrument |
| CN114816081A (en) * | 2022-04-29 | 2022-07-29 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation scheme |
| CN114816081B (en) * | 2022-04-29 | 2023-10-24 | 长沙锐逸微电子有限公司 | Low-cost high-reliability keyboard implementation method |
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| CN103298266B (en) | 2016-05-04 |
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