CN208953617U - A kind of electromagnetic shielding film earth impedance test device of monolithic FPC - Google Patents
A kind of electromagnetic shielding film earth impedance test device of monolithic FPC Download PDFInfo
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- CN208953617U CN208953617U CN201821723586.4U CN201821723586U CN208953617U CN 208953617 U CN208953617 U CN 208953617U CN 201821723586 U CN201821723586 U CN 201821723586U CN 208953617 U CN208953617 U CN 208953617U
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Abstract
A kind of electromagnetic shielding film earth impedance test device of monolithic FPC, it includes electromagnetic shielding film (1), vertical portion (2), horizontal part (3), concave part (4), screened film firing point (5), screened film test point (6), the electromagnetic shielding film of monolithic FPC includes vertical portion, horizontal part, the right end of horizontal part has concave part, concave part includes the first cell wall (41), second cell wall (42), first cell wall, second cell wall is mutually perpendicular to, it is characterized by: screened film firing point (5) is located in electromagnetic shielding film (1), screened film test point (6) is located in concave part (4), screened film firing point and screened film test point electrical property connection.The utility model only needs one or more exposed test point contact test pencils that can test；It is in fact exactly that the windowed regions be connected with EMI are extended out, by the conduction between the measurement point to extend out and ground, Lai Hengliang EMI and earthing effect.
Description
Technical field
The utility model relates to the electromagnetic shielding film testing field of monolithic FPC (flexible circuit board) more particularly to a kind of lists
The electromagnetic shielding film earth impedance test device of piece FPC.
Background technique
Electromagnetic shielding film is a kind of material for shielding EMI (electromagnetic interference), is the shield made of conductive magneto-conductive material
(Shield) electromagnetic wave is limited in a certain range, when electromagnetic wave being made to couple from the one side of shield or be radiated another side
It is suppressed or decays；Electronic product will receive the interference of frequency electromagnetic waves, and influence the quality of product, at this time the screen of screened film
The effect of covering is particularly important, and electromagnetic shielding film ground connection is one of the important prerequisite for playing its effect, and test earth impedance value is to examine
Screened film whether the method for effective grounding.
In the prior art, when monolithic FPC surveys electromagnetic shielding film earth impedance, need to scrape off screened film surface insulation layer, but
It is that the dynamics scraped is difficult to control, is difficult to touch the shild layer of screened film and FPC can be damaged.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of monolithic FPC electromagnetic shielding film
The measurement scheme of earth impedance, the validity of detection electromagnetic shielding film ground connection.By increasing test circuit on monolithic FPC；It is logical
The test point that copper sheet window point draws electromagnetic shielding film is crossed, this test point has been connected to screened film film, has measured this survey by multimeter
Resistance value between pilot and GND.
After improvement, it is only necessary to which an exposed test point contact test pencil can be tested；It is in fact exactly being connected with EMI
Windowed regions extend out, by the conduction between the measurement point to extend out and ground, Lai Hengliang EMI and earthing effect.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of electromagnetic shielding film earth impedance test device of monolithic FPC comprising electromagnetic shielding film (1), vertical portion
(2), horizontal part (3), concave part (4), screened film firing point (5), screened film test point (6), the electromagnetic shielding film packet of monolithic FPC
Vertical portion, horizontal part are included, the right end of horizontal part has concave part, and concave part includes the first cell wall (41), the second cell wall (42), the
One cell wall, the second cell wall are mutually perpendicular to, it is characterised in that: screened film firing point (5) is located in electromagnetic shielding film (1), screened film
Test point (6) is located in concave part (4), screened film firing point and screened film test point electrical property connection.
Further, screened film firing point to the first cell wall distance at a distance from screened film test point to the first cell wall phase
Distance Deng, screened film test point to the first cell wall is 0.35-0.40 times of concave part depth (T).
Further, the distance of screened film test point to the second cell wall is 0.95-1.0 times of concave part depth (T).
Further, screened film test point includes the first screened film test point (61), secondary shielding film test point (62), the
One screened film test point, secondary shielding film test point are located on same vertical line, and the first screened film test point, secondary shielding film are surveyed
Pilot and screened film firing point electrical communication, the first screened film test point, secondary shielding film test point, screened film firing point three
Line composition be similar to right angled triangle.
Further, by increasing test circuit on monolithic FPC, the screen of electromagnetic shielding film is drawn by copper sheet window point
Cover film test point, which has been connected to electromagnetic shielding film, by multimeter measure this screened film test point and GND it
Between resistance value.
Further, point contact multitester probe is tested by the one or more exposed screened films of setting to be tested, lead to
It crosses and the windowed regions be connected with EMI is extended out, pass through the conducting between the measurement screened film test point to extend out and ground
Property, Lai Hengliang EMI and earthing effect.
The utility model only needs one or more exposed test point contact test pencils that can test；In fact be exactly handle with
EMI conducting windowed regions extend out, by measurement the point to extend out and ground between conduction, Lai Hengliang EMI with connect
Ground effect.
Detailed description of the invention
Fig. 1 is the electromagnetic shielding film earth impedance schematic structural diagram of testing device of the utility model monolithic FPC；
Another example structure signal of the electromagnetic shielding film earth impedance test device that Fig. 2 is the utility model monolithic FPC
Figure.
In figure: electromagnetic shielding film 1, vertical portion 2, horizontal part 3, concave part 4, the first cell wall 41, the second cell wall 42, screened film
Firing point 5, screened film test point 6, the first screened film test point 61, secondary shielding film test point 62.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
Referring to attached drawing 1-2: the electromagnetic shielding film earth impedance test device of monolithic FPC, including it is electromagnetic shielding film 1, perpendicular
Straight portion 2, horizontal part 3, concave part 4, screened film firing point 5, screened film test point 6.
The electromagnetic shielding film 1 of monolithic FPC includes vertical portion 2, horizontal part 3, and the right end of horizontal part 3 has concave part 4, groove
Portion 4 includes the first cell wall 41, the second cell wall 42, and the first cell wall 41, the second cell wall 42 are mutually perpendicular to, and screened film firing point 5 is located at
Within/on electromagnetic shielding film 1, screened film test point 6 is located in concave part 4, and screened film firing point 5 and screened film test point 6 are electrically
Connection.
The distance of 5 to the first cell wall 41 of screened film firing point is equidistant with 6 to the first cell wall 41 of screened film test point,
The distance of 6 to the first cell wall 41 of screened film test point is 0.35-0.40 times of 4 depth T of concave part, screened film test point 6 to the
The distance of two cell walls 42 is 0.95-1.0 times of 4 depth T of concave part.
Referring to attached drawing 2, screened film test point 6 includes the first screened film test point 61, secondary shielding film test point 62, and first
Screened film test point 61, secondary shielding film test point 62 are located on same vertical line, the first screened film test point 61, secondary shielding
Film test point 62 and 5 electrical communication of screened film firing point, the first screened film test point 61, secondary shielding film test point 62, shielding
The line form right angle triangle of 5 three of film firing point/be similar to right angled triangle.It is clicked through by the way that multiple screened film tests are arranged
One step improves the accuracy of measurement, validity.
The utility model only needs one or more exposed test point contact test pencils that can test；In fact be exactly handle with
EMI conducting windowed regions extend out, by measurement the point to extend out and ground between conduction, Lai Hengliang EMI with connect
Ground effect.
Above embodiment is the explanation to the utility model, is not the restriction to the utility model, it is possible to understand that not
These embodiments can be carried out with a variety of variations, modification, replacement in the case where being detached from the principles of the present invention and spirit and become
Type, the protection scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (5)
1. the electromagnetic shielding film earth impedance test device of monolithic FPC a kind of comprising electromagnetic shielding film (1), vertical portion (2),
Horizontal part (3), concave part (4), screened film firing point (5), screened film test point (6), the electromagnetic shielding film of monolithic FPC include perpendicular
Straight portion, horizontal part, the right end of horizontal part have concave part, and concave part includes the first cell wall (41), the second cell wall (42), the first slot
Wall, the second cell wall are mutually perpendicular to, it is characterised in that: screened film firing point (5) is located in electromagnetic shielding film (1), screened film test
Point (6) is located in concave part (4), screened film firing point and screened film test point electrical property connection.
2. the electromagnetic shielding film earth impedance test device of monolithic FPC according to claim 1 a kind of, which is characterized in that
Screened film firing point to the first cell wall distance with screened film test point being equidistant to the first cell wall, screened film test point is extremely
The distance of first cell wall is 0.35-0.40 times of concave part depth (T).
3. the electromagnetic shielding film earth impedance test device of monolithic FPC according to claim 2 a kind of, which is characterized in that
The distance of screened film test point to the second cell wall is 0.95-1.0 times of concave part depth (T).
4. the electromagnetic shielding film earth impedance test device of monolithic FPC according to claim 1 a kind of, which is characterized in that
Screened film test point includes the first screened film test point (61), secondary shielding film test point (62), the first screened film test point, the
Two screened film test points are located on same vertical line, and the first screened film test point, secondary shielding film test point are connected with screened film
Point electrical communication, the first screened film test point, secondary shielding film test point, the line composition of screened film firing point three are similar to
Right angled triangle.
5. the electromagnetic shielding film earth impedance test device of monolithic FPC according to claim 4 a kind of, which is characterized in that
Increase setting test circuit on monolithic FPC, draws the screened film test point of electromagnetic shielding film, the screened film in copper sheet window point
Test point has been connected to electromagnetic shielding film, measures the resistance value between this screened film test point and GND by multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821723586.4U CN208953617U (en) | 2018-10-24 | 2018-10-24 | A kind of electromagnetic shielding film earth impedance test device of monolithic FPC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821723586.4U CN208953617U (en) | 2018-10-24 | 2018-10-24 | A kind of electromagnetic shielding film earth impedance test device of monolithic FPC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208953617U true CN208953617U (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821723586.4U Active CN208953617U (en) | 2018-10-24 | 2018-10-24 | A kind of electromagnetic shielding film earth impedance test device of monolithic FPC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188097A (en) * | 2018-10-24 | 2019-01-11 | 江西合力泰科技有限公司 | A kind of the electromagnetic shielding film earth impedance test device and method of monolithic FPC |
-
2018
- 2018-10-24 CN CN201821723586.4U patent/CN208953617U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188097A (en) * | 2018-10-24 | 2019-01-11 | 江西合力泰科技有限公司 | A kind of the electromagnetic shielding film earth impedance test device and method of monolithic FPC |
| CN109188097B (en) * | 2018-10-24 | 2023-09-15 | 江西合力泰科技有限公司 | Device and method for testing ground impedance of electromagnetic shielding film of single FPC (flexible printed circuit) |
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