FIELD: measuring equipment. SUBSTANCE: reference specimen for measuring thickness of deposited metal layer in printed-circuit boards, certified for thickness and specific resistance, is made of rolled copper foil and the measuring surface is the free surface of the first internal coil of the roll. The roll is accommodated in a through hole in the body and its ends are brought out into a special slot in the body. EFFECT: sufficient accuracy of checking and calibration of instruments. 4 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| STANDARD SAMPLE FOR METROLOGICAL ASSURANCE OF MEASURING INSTRUMENTS OF GENERAL AND SPECIFIC SURFACE AND ITS MANUFACTURING METHOD | 2015 |
|
RU2596227C1 |
| REFERENCE SPECIMEN | 0 |
|
SU1359658A1 |
| PRINTED-CIRCUIT BOARD MANUFACTURING PROCESS | 1991 |
|
RU2072122C1 |
| REFERENCE SPECIMEN FOR COATING THICKNESS GAUGE CALIBRATION AND CHECKING | 0 |
|
SU1105751A1 |
| COATING THICKNESS STANDARD FOR CALIBRATING AND VERIFYING ELECTROMAGNETIC AND EDDY-CURRENT THICKNESS METERS | 0 |
|
SU1710996A1 |
| REFERENCE STANDARD FOR CHECKING AND CALIBRATING COATING THICKNESS GAUGES | 0 |
|
SU1377573A1 |
| PROCESS OF APPLICATION OF FILM PHOTORESIST ON SURFACE OF WORKSTOCK OF TWO SIDED PRINTED CIRCUIT BOARD MADE OF FOILED DIELECTRIC | 1987 |
|
RU1493086C |
| STANDARD FOR MEASURING THICKNESS OF COATING | 0 |
|
SU1665222A1 |
| DEVICE FOR ORIENTED FEED OF MIDGET PARTS, PRIMARILY SURFACE-MOUNTED RADIO COMPONENTS | 1993 |
|
RU2085059C1 |
| METHOD OF CHECKING EDDY-CURRENT THICKNESS GAUGES | 0 |
|
SU1093962A1 |
