CN218868425U

CN218868425U - HDI board

Info

Publication number: CN218868425U
Application number: CN202221642302.5U
Authority: CN
Inventors: 周陵; 马龙
Original assignee: Shenzhen Zhongfu Circuit Co ltd
Current assignee: Shenzhen Zhongfu Circuit Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-04-14
Anticipated expiration: 2032-06-29

Abstract

The utility model relates to a PCB board preparation technical field specifically discloses a HD I board, should be including setting up the board production technology limit is on four angular positions's the layer test coupon detecting element partially, the layer is on a relatively side test coupon detecting element includes a plurality of pilot holes that set up in proper order at the interval, and the inlayer C l earance unilateral of pilot hole increases in proper order, when drilling, drills the pilot hole earlier, and the pilot hole is not squinted in the affirmation, drills the unit hole again afterwards to prevent appearing bad in batches.

Description

HDI board

Technical Field

The application relates to the technical field of PCB board manufacturing, especially, relate to a HDI board.

Background

HDI is an abbreviation of English high intensity interconnect, is translated into high density interconnection, and is a general name of fine circuit boards in the PCB industry at present. The fine circuit board is generally designed by multi-layer pressing and multi-step buried blind holes, because the distance from an inner hole to copper of a unit is small and the holes are dense, the value of a production board is high, the hole site precision and the problems of hole drilling and layer deviation are influenced by multiple factors of the contact ratio of the A/B surface of an inner layer, the alignment degree between pressing layers, core board expansion and contraction and the hole drilling precision, if the problems are not found in time, the batch scrapping of PCBs can be caused, and the problem of hole drilling layer deviation detection is a technical problem which needs to be solved urgently in the field at present.

Disclosure of Invention

The application provides an HDI board to prevent that drilling layer is bad partially.

The application provides a HDI board, including setting up the inclined to one side test coupon detecting element in layer of four angular position departments in production board technology limit, the inclined to one side test coupon detecting element in layer includes a plurality of pilot holes that set up at interval in proper order, and the inlayer Clearance of pilot hole increases in proper order.

Further, the layer deviation test coupon detection unit comprises 7 test holes, the inner layer clearence single edge is 0 mm, 0.075mm, 0.1mm, 0.125mm, 0.15mm, 0.175mm and 0.2mm in sequence, and the distance between every two test holes is 2mm.

Further, the surface of the layer bias test coupon detection unit is a copper surface.

Further, the attributes of the trial holes are all PTH holes

The application discloses HDI board sets up the inclined to one side test coupon detecting element in the technology edge of production board, and it just produces after confirming qualified as the pre-drilling, first piece pre-drilling when production, prevents to appear batch bad condition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a production board provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a layer bias test coupon detection unit provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

Referring to fig. 1 and 2, an embodiment of the present application provides a HDI board layer deviation detection method, including setting layer deviation testing coupon detection units at four corners of a process edge of a production board, before drilling production, drilling a coupon hole of the layer deviation testing coupon detection unit, and after confirming that the drilled hole is not deviated, drilling an inner hole of the unit again to prevent batch defects.

This application sets up the inclined to one side test coupon detecting element on the technology edge of production board, and it just produces after confirming qualified as the pre-drilling, first piece pre-drilling when production, prevents to appear bad condition in batches.

The layer deviation testing coupon detection unit comprises a plurality of test holes, and the inner layer Clearance single edges of the test holes are sequentially increased. In one embodiment, as shown in fig. 2, the layer deviation test coupon detection unit comprises 7 test holes, the inner layer Clearance single side is 0, 0.075mm, 0.1mm, 0.125mm, 0.15mm, 0.175mm, 0.2mm in sequence, and the distance between each test hole is 2mm. The surface of the layer deviation test coupon detection unit is a copper surface. The drilled holes are all PTH holes. This application test hole is according to the hole to the 1mil of interval rank increment of copper sheet, can detect concrete offset during the test to assess whether the safe distance of hole to copper sheet satisfies the customer's requirement, guarantee PCB's quality, stopped the risk that this type of bad problem produced.

The application also relates to a production board, including setting up the layer of four angular positions department on production board technology limit test coupon detecting element 10 partially, layer test coupon detecting element includes a plurality of pilot holes 11 that set up in proper order at the interval, and the inlayer clearence 12 of pilot hole is unilateral to increase in proper order.

The layer deviation test coupon detection unit 10 comprises 7 test holes 11, wherein the inner layer clearence single edges are 0 mm, 0.075mm, 0.1mm, 0.125mm, 0.15mm, 0.175mm and 0.2mm in sequence, and the distance between every two test holes is 2mm. The surface of the coupon detection unit for the layer deviation test is a copper surface. The production board adopts the HDI layer deviation detection method to detect, when in production, a hole is drilled on the layer deviation testing coupon unit, and the drilled hole is a PTH hole.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The HDI board is characterized by comprising layer deviation testing coupon detection units arranged at four corner positions of a technological edge of a production board, wherein each layer deviation testing coupon detection unit comprises a plurality of test holes which are sequentially arranged at intervals, and the inner layer Clearance single edges of the test holes are sequentially increased; the layer deviation testing coupon detection unit comprises 7 test holes, the inner layer Clearance single edges are 0 mm, 0.075mm, 0.1mm, 0.125mm, 0.15mm, 0.175mm and 0.2mm in sequence, and the distance between every two test holes is 2mm.

2. An HDI board according to claim 1, in which the surface of the layer bias test coupon detection unit is a copper surface.

3. An HDI plate according to claim 1 in which the attributes of the trial holes are PTH holes.