CN204302329U - Microelectromechanical-systems testing needle - Google Patents

Abstract

The utility model relates to a kind of microelectromechanical-systems testing needle, belongs to technical field of electronic products.The microelectromechanical-systems testing needle of this structure comprises top syringe needle and bottom syringe needle, and is connected to the serpentine bend part between described top syringe needle and bottom syringe needle, and described serpentine bend part is made up of some end to end S type unit.Before and after when pressurized, the contact of S type unit, reduces resistance during chip detection high frequency, thus effectively improves testing needle service life, reduces chip detection cost, and the structure detection of the microelectromechanical-systems testing needle of this utility model, production technology is easy.

Description

Microelectromechanical-systems testing needle

Technical field

The utility model relates to technical field of electronic products, particularly chip technology field, specifically refers to a kind of microelectromechanical-systems testing needle.

Background technology

MEMS (Micro-Electro-Mechanical System, MEMS) testing needle is the common equipment in chip testing.Existing MEMS testing needle has substantially all selected the testing needle of similar Pogo Pin version, the testing needle generally selected mainly comprises 4 parts, Shell (being commonly called as shell), Top Plunger (being commonly called as top syringe needle), Bottom Plunger (being commonly called as bottom syringe needle), Spring (being commonly called as spring).Wherein, Music Wire (being commonly called as piano wire) generally all selected by the material of spring.This clock testing needle parts machining is more difficult, and assembling requires higher, and cost is relative also higher.Due to these limitations, propose stern challenge to developing life-span testing needle that is long and advantage of lower cost.In common chip testing, can simplify traditional testing needle structure, reducing the cost of testing needle, is one of them key point.

Utility model content

The purpose of this utility model overcomes above-mentioned shortcoming of the prior art, provides a kind of structure simple, effectively can improve testing needle service life, the microelectromechanical-systems testing needle reduced costs simultaneously.

In order to realize above-mentioned object, microelectromechanical-systems testing needle of the present utility model has following formation:

This microelectromechanical-systems testing needle comprises top syringe needle and bottom syringe needle, also comprises the serpentine bend part be connected between described top syringe needle and bottom syringe needle, and described serpentine bend part is made up of some end to end S type unit.

In this microelectromechanical-systems testing needle, before described each S type unit comprises one protruding and one after projection, its not subjected to pressure state, between the rear projection of last S type unit and the front projection of a rear S type unit, there is gap, at pressured state, the rear projection of last S type unit and the front projection contacts of a rear S type unit.

In this microelectromechanical-systems testing needle, one end of described top syringe needle connection serpentine bend part is provided with a rear projection, and one end that described bottom syringe needle connects serpentine bend part is provided with a front projection.

The microelectromechanical-systems testing needle that have employed this utility model comprises top syringe needle and bottom syringe needle, also comprises the serpentine bend part be connected between described top syringe needle and bottom syringe needle, and described serpentine bend part is made up of some end to end S type unit.Before and after when pressurized, the contact of S type unit, reduces resistance during chip detection high frequency, thus effectively improves testing needle service life, reduces chip detection cost, and the structure detection of the microelectromechanical-systems testing needle of this utility model, production technology is easy.

Accompanying drawing explanation

Fig. 1 is the structural representation of microelectromechanical-systems testing needle of the present utility model.

Fig. 2 is the partial enlarged drawing (not subjected to pressure state) of part A in Fig. 1.

Fig. 3 is the detailed schematic of the S type unit in microelectromechanical-systems testing needle of the present utility model.

Detailed description of the invention

In order to more clearly understand technology contents of the present utility model, describe in detail especially exemplified by following examples.

Referring to shown in Fig. 1, is the structural representation of microelectromechanical-systems testing needle of the present utility model.

In one embodiment, the serpentine bend part 3 that this microelectromechanical-systems testing needle comprises top syringe needle 1 and bottom syringe needle 2 and is connected between described top syringe needle 1 and bottom syringe needle 2, described serpentine bend part 3 is made up of some end to end S type unit.As shown in Figure 1 and Figure 2, before each S type unit comprises one protruding 4 and one after protruding 5, its not subjected to pressure state, between rear protruding 5 of last S type unit and front protruding 4 of a rear S type unit, there is gap 6, at pressured state, rear protruding 5 of last S type unit contacts (not shown) with front protruding 4 of a rear S type unit.

In preferred embodiment, projection 5 after one end that described top syringe needle 1 connects serpentine bend part 3 is provided with, one end that described bottom syringe needle 2 connects serpentine bend part 3 is provided with one front protruding 4.

In application of the present utility model, the main body one's duty of this microelectromechanical-systems testing needle adopts serpentine configuration, and be attached with two projections in each serpentine sector, while compression, two projections contact with each other, to reduce resistance during high frequency.

The material selection Pd-Co alloy PdCo of this microelectromechanical-systems testing needle.Compared with traditional testing needle, structure is simple, and cost is lower, and the life-span is long.

As shown in Figure 3, get arbitrarily a joint S type unit, the relation of power F and compression distance Δ meets following formula:

$\mathrm{\Δ}=\left(\frac{2F{R}^3}{B}\right)[\frac{1}{3}{\mathrm{\γ}}^3+\mathrm{\β}{\mathrm{\γ}}^2+2\mathrm{\γ}(1-\cos \mathrm{\β})+\frac{\mathrm{\β}}{2}-1/4\sin 2\mathrm{\β}]{\sin }^2\mathrm{\βn}$

β-th in formula ³e/12, b are cross-sectional width, and h is section thickness, and E is the elastic modelling quantity of material; γ=l/R; N is joint number.There is error in actual power and the power of theory calculate, belongs to normal phenomenon.

The microelectromechanical-systems testing needle that have employed this utility model comprises top syringe needle and bottom syringe needle, also comprises the serpentine bend part be connected between described top syringe needle and bottom syringe needle, and described serpentine bend part is made up of some end to end S type unit.Before and after when pressurized, the contact of S type unit, reduces resistance during chip detection high frequency, thus effectively improves testing needle service life, reduces chip detection cost, and the structure detection of the microelectromechanical-systems testing needle of this utility model, production technology is easy.

In this description, the utility model is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, description and accompanying drawing are regarded in an illustrative, rather than a restrictive.

Claims (3)

1. a microelectromechanical-systems testing needle, it comprises top syringe needle and bottom syringe needle, it is characterized in that, also comprise the serpentine bend part be connected between described top syringe needle and bottom syringe needle, described serpentine bend part is made up of some end to end S type unit.

2. microelectromechanical-systems testing needle according to claim 1, it is characterized in that, before described each S type unit comprises one protruding and one after projection, its not subjected to pressure state, between the rear projection of last S type unit and the front projection of a rear S type unit, there is gap, at pressured state, the rear projection of last S type unit and the front projection contacts of a rear S type unit.

3. microelectromechanical-systems testing needle according to claim 2, is characterized in that, one end of described top syringe needle connection serpentine bend part is provided with a rear projection, and one end that described bottom syringe needle connects serpentine bend part is provided with a front projection.