IPC-4761 via type

IPC-4761自己总结

Type Cat Description figure process Remark

I I-a Tented Via Tented Via (Type I Via):

A via with a dry film mask material

applied bridging over the via

wherein no additional materials are

in the hole. It may be applied to one

side (Type I-a) or both sides (Type

I-b) of the via structure.

Process: Vacuum laminated film

material that is photo-definable. Single Sided Tented Not Recommended

I I-b Tented Via

II II-a Tented and

Covered Vias A Type I via with a secondary

covering of mask material applied

over the tented via. The material

may be applied to one side (Type

II-a) or both sides (Type II-b) of the

via structure.

Process: Application of mask over

Type I.

Single Sided Tented and

Covered Not

Recommended

II II-b Tented and

Covered Vias

III III-a Plugged Via A via with material applied allowing

partial penetration into the via. The

plug material may be applied from

either one side (Type III-a) or both

sides (Type III-b) of the via

structure.

Process: Screened and Roller

Coated. Single Sided Plugged Not Recommended.

III III-b Plugged Via

IV IV-a Plugged and

Covered Via A Type III via with a secondary

covering of material applied over

the via. The plug and secondary

covering material may be applied

from either one side (Type IV-a) or

both

sides (Type IV-b) of the via

structure.

Process: Application of mask over

Type III.

Single Sided Plugged and

Covered Not

Recommended

IV IV-b Plugged and

Covered Via

V V Filled Via A via with material applied into the

via targeting a full penetration and

encapsulation of the hole.

Process: Screened, roller-coated, or

squeegeed.

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