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How to distinguish HDI PCB first-order and second-order and third-order?

How to distinguish HDI PCB first-order and second-order and third-order?

  • Categories:News
  • Author:csaa
  • Origin:
  • Time of issue:2020-06-11 09:50
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How to distinguish HDI PCB first-order and second-order and third-order?

Information

The way to distinguish first-order, second-order, and third-order is to look at the number of laser holes. The PCB core board is pressed several times, and the laser holes are drilled several times, which is the order. This is the only difference.

1. Drill holes after pressing once == "Press the copper foil again on the outside ==" and then laser drill holes, this is the first order, as shown in the figure below

2. Drill holes after pressing once ==》Press the copper foil again on the outside ==》Laser again==》Press the copper foil again on the outer layer==》Drill the laser again. This is the second order. It mainly depends on how many times your laser has been shot, that is, how many orders.

The second order has two types: stacked holes and bifurcated holes.

As shown in the figure below, there are eight layers of two-step stacked holes, 3-6 layers are laminated first, and the outer layer 2, 7 is laminated, and the laser hole is punched once. Then layer 1, 8 on it and make a laser hole again. It is to make two laser holes. Because such holes are superimposed, the process difficulty will be higher and the cost will be higher.

 

The following picture shows the eight-layer second-order cross blind hole. This processing method is the same as the eight-layer second-order stacked hole above. It also requires two laser holes. But the laser holes are not stacked together, so the processing difficulty is much less.

The third order, the fourth order and so on.
Expansion information

HDI is the abbreviation of High Density Interconnector. It is a kind of (technology) for the production of printed boards. It uses micro-blind and buried via technology for a circuit board with a relatively high line distribution density. HDI is a compact product designed for small-capacity users.

Keyword:

The evaluation system of the circuit board factory should follow the following principles

The evaluation system of the circuit board factory should follow the following principles

Establishing a good cooperative relationship with circuit board factories is conducive to cost reduction, response time reduction and the creation of new market value, etc. The core issue is how to choose the ideal circuit board factory. There are many factors involved in the evaluation of circuit board factories, and the evaluation index systems are diverse, both qualitative and quantitative, and the index weights are also different. Therefore, it is necessary to establish a universal and expandable evaluation index system for circuit board factories. , And the indicator system should follow the following principles:
The use of soft and hard circuit boards?

The use of soft and hard circuit boards?

In our daily life, circuit boards are mostly single-sided, double-sided, or multi-layer boards, rigid boards, metal-based circuit boards, aluminum, copper substrates, thermally conductive fiberboards, etc., do you know what a flexible and rigid circuit board is? Rigid-flex circuit board: refers to a special circuit board made by pressing a rigid circuit board (PCB) and a flexible circuit board (FPC). The main board materials used are rigid board FR4 and flexible board polyimide (PI). Rigid and flexible circuit boards combine the rigid characteristics of rigid circuit boards and the advantages of flexible circuit
Soft and hard circuit board production process

Soft and hard circuit board production process

The flexible and hard circuit board is the flexible circuit board and the rigid circuit board. After pressing and other processes, they are combined according to the relevant process requirements to form a circuit board with FPC characteristics and PCB characteristics. In the past, two hard boards were connected by using soft boards and connectors to connect each other. In order to improve the reliability of the connection between the rigid board and the flexible board, the flexible board is directly fabricated between two rigid boards in the printed circuit board (PCB) factory, which can avoid the subsequent connection process, whether it is a rigid board manufacturer or FPC manufacturers are now able to supply rigid-flex boards. Under the demand for light and thin end products, the

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