The disclosure relates to the field of display technology, and in particular, to a printing method.
The printing process is an important link of the glass glue encapsulation process, and the quality of the effect of the printing process directly affects the encapsulation effect. Because of the advantages that the device is simple, the operations are convenient, the plate making is easy and cost-effective, and the adaptability is strong, and the like, the screen printing has already become a widely applied printing method. However, since the screen of the screen printing has a certain tension and the material and the production process of the screen cannot ensure that the tensions of individual points are identical, this results in that the offset directions and the offset amounts of the glass glue at different points in the procedure of printing are different, that is, the offset degrees of the printed glass glue at individual positions are different. In addition, since the glass glue has certain liquidity, this results in that the burr phenomenon will occur to a graphic printed by the screen.
The printing offset will affect both the subsequent laser sealing process and cutting process. First, when the printing offset is too large, since the laser route of the laser sealing process is fixed, this results in that the glass cannot be effectively sintered by laser, and then easily leads to encapsulation failure. Second, since the printing offset is too large, this may give rise to a case of the glass covering the cutting line, and thereby easily causes poor cutting. Likewise, too large glass burrs also easily cause poor cutting.
With respect to the problems existing in the related art, the disclosure provides a printing method, which may at least partly solve the problems of printing offset and burrs existing in the printing process of the related art.
According to an embodiment of the disclosure, there is provided a printing method comprising: forming an organic material layer on a non-printing region of a substrate, the burning point of the organic material layer being lower than the pre-curing temperature of glass glue; performing printing processing on the substrate so as to form the glass glue on a printing region of the substrate; and performing a burning processing of the organic material layer so as to separate the organic material layer from the substrate.
By forming the organic material layer on the substrate, the printing method according to the disclosure causes the organic material layer to fully block the non-printing region when the glass glue is printed, and then removes or takes away excess glass glue which causes the printing offset and burrs by burning processing, thereby effectively avoiding the occurrence of the printing offset and burrs and greatly reducing the rate of defective goods.
In an embodiment of the printing method according to the disclosure, the step of performing a burning processing of the organic material layer may comprise performing a pre-curing processing of the glass glue. Since the burning point of the organic material layer is lower than the pre-curing temperature of the glass glue, it is ensured that burning processing may certainly be performed on the organic material layer when the pre-curing processing of the glass glue is performed, so that the burning processing of the organic material layer can be done by the pre-curing processing of the glass glue.
In an embodiment of the printing method according to the disclosure, the pre-curing temperature of the glass glue can range from 100° C. to 120° C. At this point, the range of the burning point of the organic material layer may be 85° C. to 115° C. For example, the pre-curing temperature of the glass glue is 100° C., and the range of the burning point of the organic material layer is 85° C. to 95° C.; or, the pre-curing temperature of the glass glue is 120° C., and the range of the burning point of the organic material layer is 105° C. to 115° C.; or, the pre-curing temperature is 110° C., and the range of the burning point is 95° C. to 105° C.; or, the pre-curing temperature is 110° C., and the burning point is 100° C.
In an embodiment of the printing method according to the disclosure, before the step of performing a burning processing of the organic material layer, the printing method may comprise: placing the substrate in flowing gas with a fixed flow direction. Consequently, when the organic material layer is burned, the glass glue adhered to the organic material layer will be driven up and taken away together with hot gas, thereby effectively avoiding the occurrence of the printing offset and burrs so as to greatly reduce the rate of defective goods.
In an embodiment of the printing method according to the disclosure, the flowing gas may be compressed air.
In an embodiment of the printing method according to the disclosure, the organic material layer and the glass glue may have the same thickness, and/or the organic material layer may be made of a material which cannot react chemically with the glass glue 104, thereby avoiding damage to the glass glue and hence to the printing process.
To make the skilled in the art better understand the technical solutions of the disclosure, in the following, the technical solutions of the disclosure will be described in detail in conjunction with the drawings.
step 1001, forming an organic material layer on a non-printing region of a substrate, wherein the burning point of the organic material layer is lower than the pre-curing temperature of glass glue;
step 1002, performing printing processing on the substrate so as to form the glass glue on a printing region of the substrate; and
step 1003, performing a burning processing of the organic material layer so as to separate the organic material layer from the substrate.
By forming the organic material layer on the substrate, the printing method according to the embodiment of the disclosure as shown in
In the following, the individual steps of the printing method according to the embodiment of the disclosure as shown in
Since before the printing process, as shown in
Further, the organic material layer 101 as shown in
In addition, as described at the step 1001 of the printing method shown in
Since the organic material layer 101 fully blocks the non-printing region 103 of the substrate 100 and the glass glue 104 has a certain viscosity, when the printing offset occurs, the glass glue 104 in the groove 105 of the printing region has a certain pulling force for the glass glue 104 deviating from the printing region and adhered to the top of the organic layer 101, such that the glass glue 104 to which the printing offset occurs levels into the groove 105.
At the step 1003 of the printing method as shown in
In the description of the disclosure, it needs to be noted that, the orientation or position relationship indicated by the terms “on”, “below”, etc. is an orientation or position relationship based on what is shown in the drawings, it is only for the convenience of describing the disclosure and simplifying the description, but does not indicate or imply that the apparatus or element referred to must have a specific orientation and be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the disclosure. For those of ordinary skills in the art, the specific meaning of the above terms in the disclosure may be understood according to the specific circumstances.
It also needs to be noted that in this context a relational term such as first, second, etc. is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply there is any such an actual relation or order between these entities or operations. Moreover, the term “comprise”, “comprising” or any other conjugation thereof is intended to encompass a non-exclusive inclusion, such that a procedure, method, article, or apparatus comprising a series of elements not only comprises those elements, but also comprises other elements not expressly listed, or further comprises elements inherent to the procedure, method, article, or apparatus. In the absence of more restrictions, an element defined by a phrase “comprises a . . . ” does not exclude the presence of additional identical elements in a procedure, method, article, or apparatus comprising the element.
It may be appreciated that, the above embodiments are exemplary embodiments employed for the purpose of illustrating the principles of the disclosure, and however, the disclosure is not limited thereto. For those of ordinary skills in the art, various variations and improvements may be made without departing from the spirit and substance of the disclosure, and these variations and improvements are also construed as falling within the protection scope of the disclosure.
Number | Date | Country | Kind |
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201610664141.2 | Aug 2016 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2017/088679 | 6/16/2017 | WO | 00 |