CN209806147U

CN209806147U - PCB capable of detecting character printing precision

Info

Publication number: CN209806147U
Application number: CN201821977622.XU
Authority: CN
Inventors: 曾祥福; 王欣; 周刚
Original assignee: Xiang Science And Technology Circuit Board Co Ltd Of Daya Gulf Section Of Huizhou City
Current assignee: Xiang Science And Technology Circuit Board Co Ltd Of Daya Gulf Section Of Huizhou City
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2019-12-17
Anticipated expiration: 2028-11-28

Abstract

The utility model relates to a PCB board capable of detecting the printing precision of characters, which comprises a substrate and a detection part arranged on the substrate, wherein the detection part is of an inward concave type, a character printing area is arranged on the substrate, and the detection part is arranged in the character printing area; the number of the detection parts is four, and the detection parts are respectively arranged at four corners of the character printing area; characters are printed in the character printing area through ink, the ink can cover the detection portion, the character printing deviation inspection standard can be effectively standardized, whether an operator is skilled or not can be found out whether the deviation exists or not by observing four corners of the printing area by eyes after the characters are printed, the use is convenient, and the defect that the characters of the PCB are printed on the welding disc by the deviation can be effectively avoided.

Description

PCB capable of detecting character printing precision

Technical Field

The utility model relates to a PCB makes the field, especially relates to a PCB board that can carry out characters printing precision and detect.

Background

In the production process of a Printed Circuit Board (PCB), character printing is one of indispensable procedures, and silk-screen printing has the advantages of low cost, high efficiency, high quality and the like, and is one of character printing processes widely applied in the industry. In the existing screen printing process, an operator is required to judge whether the position of the pattern on the screen printing plate printed on the PCB is aligned, and the accuracy of the operation depends on the experience accumulation, proficiency and responsibility of the operator. At present, the development precision of a PCB is higher and higher, the phenomenon that a PAD (PAD) is printed on a local character offset easily occurs in the screen printing process, and the phenomena of insufficient soldering and tin absorption and the like occur when a piece is pasted on a rear working section, so that the functional failure is caused. The utility model provides a can carry out the PCB board that the character printing precision detected, inexperienced operation personnel also can use the device to judge whether the position of figure on the half tone printed on the PCB board is aimed at, effectively improves work efficiency and the degree of accuracy.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a PCB board that can carry out characters printing precision and detect, includes the base plate and sets up the detection portion on the base plate, its characterized in that: the detection part is concave, a character printing area is arranged on the substrate, and the detection part is arranged in the character printing area. The number of the detection parts is four, and the detection parts are respectively arranged at four corners of the character printing area; characters are printed in the character printing area through ink, and the ink can cover the detection portion. The detection unit, the substrate, and the ink can be distinguished by visual inspection. When characters are printed on the PCB, because the existing character printing machine is along the straight line direction when the characters are printed, the printed characters at two ends are not deviated as long as the detection parts at four corners of the character printing area on the PCB are completely covered, and the printed characters in the middle are not deviated.

Preferably, the color of the detection part is different from that of the substrate and the ink, when the detection part is not completely covered by the ink, an operator can easily visually find the exposed detection part through the color difference, the printed text is printed unevenly at the moment, and if the detection part is completely covered by the ink and the printed text is aligned, the phenomenon that the PCB is offset to the upper bonding pad does not occur in the PCB at the moment.

Preferably, the detection portion is a copper wire, and the copper wire is embedded in the substrate. The line width of copper line is less than or equal to 0.5mm than the line width of printing characters, and the length of copper line is less than or equal to 1.0mm than the length of printing characters.

preferably, the copper wire has a width of 1.5mm and a length of 10 mm.

the utility model provides a pair of can carry out detection portion accessible of PCB board that characters printing precision detected makes through following method:

S1: conventionally preprocessing a PCB (printed circuit board), designing a detection part on an outer layer circuit substrate, and reserving copper wires with the width of 1.5mm and the length of 10mm at four corners of a character printing area of the PCB after etching;

s2: electrostatic painting is carried out on the PCB;

S3: pre-baking to primarily cure the paint;

S4: shading the detection part and then exposing to ensure that the paint can be firmly adhered to the board surface after hardening;

S5: and (3) washing out the paint which is not hardened during exposure by using sodium carbonate, and then baking, wherein the copper wire is exposed out of the PCB to form a detection part, and the copper wire is embedded in the PCB.

The utility model provides a pair of can carry out PCB board that characters printing precision detected can effectively standardize characters printing off normal inspection standard, no matter operating personnel technique is skilled or not, as long as four corners of range estimation printing district just can discover whether off normal after characters printing is accomplished, convenient to use can effectively avoid the characters printing of PCB board bad that the pad leads to on the wrong side.

The utility model provides a can carry out the testing part of the PCB board that the character printing precision detected can add in the normal manufacturing process of printing board, consequently the utility model provides a pair of PCB board that can carry out the character printing precision detection just can detect out effectively whether there is seal line word off normal phenomenon on the basis that does not additionally increase PCB board manufacturing procedure.

Drawings

the figures further illustrate the invention, but the embodiments in the figures do not constitute any limitation of the invention.

fig. 1 is a schematic structural view of a PCB board capable of detecting printing precision of characters according to an embodiment of the present invention.

fig. 2 is a sectional view of a PCB board capable of detecting printing precision of characters according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the PCB board capable of detecting the printing precision of the characters after completing the printing of the characters according to an embodiment of the present invention.

Fig. 4 is a B-B cross-sectional view of the PCB board capable of detecting the printing precision of the characters after completing the printing of the characters according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-2, an embodiment of the utility model provides a can carry out PCB that characters printing precision detected, including base plate 1 and the copper line 2 of indent on base plate 1, the width is 1.5mm and length is 10 mm's copper line 2 and is surrounded but not covered by paint directly over by the paint 3 of solder mask solidification on the horizontal direction, is equipped with characters printing area on base plate 1, and copper line 2 is located in the characters printing area. The number of copper lines 2 is four and respectively the symmetry sets up in four edges of characters printing district, and copper line 2 is on a parallel with the long limit of base plate 1 and the minor face of perpendicular to base plate 1.

As shown in fig. 3-4, the text printing area is printed with ink 4, and the ink 4 covers the copper wires 2. The copper wire 2, the substrate 1 and the ink 4 can be distinguished by visual inspection. When characters are printed on the PCB, because the existing character printing machine is along the linear direction when the characters are printed, the printed characters at two ends are not deviated as long as the copper wires 2 at the four corners of the character printing area on the PCB are completely covered, and the printed characters in the middle are not deviated. When the PCB carries out the characters printing, the condition that four angle characters strip printed on copper line 2 is inspected to the eye after adjusting the position, if copper line 2 appears the copper phenomenon, it is partially unacceptable to show the characters printing, if the four corners all is that the characters cover on copper line 2 completely, the explanation position has aimed at.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a PCB board that can carry out characters printing precision and detect, includes the base plate and sets up the detection portion on the base plate, its characterized in that:

The detection part is concave, a character printing area is arranged on the substrate, and the detection part is arranged in the character printing area;

the number of the detection parts is four, and the detection parts are respectively arranged at four corners of the character printing area; characters are printed in the character printing area through ink, and the ink covers the detection part;

The detection portion, the substrate, and the ink can be distinguished by visual inspection.

2. The PCB board capable of detecting the printing precision of the characters according to claim 1, wherein: the color of the detection portion is different from the substrate and the ink.

3. The PCB board capable of detecting the printing precision of the characters as claimed in claim 2, wherein: the detection part is a copper wire, and the copper wire is embedded in the substrate.

4. The PCB board capable of performing text printing accuracy detection according to claim 3, wherein: copper line width is less than or equal to 0.5mm than the line width in printing characters, the length of copper line is less than or equal to 1.0mm than the length in printing characters.

5. The PCB board capable of performing text printing accuracy detection according to claim 4, wherein: the copper line width is 1.5mm and length is 10 mm.