Patent US4973799A successfully refreshed from Google Patents.
US4973799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board for use with an image forming apparatus
Assignee: Konica Minolta Inc
•
Filing: 1989-08-21
•
Granted: 1990-11-27
•
Expires: 2009-08-21
Abstract
Abstract A circuit board for mounting a CPU for controlling an image processing apparatus, comprising a multilayered circuit board for mounting the CPU, and a shield layer for shielding the multilayered circuit board without connecting the shield layer to the circuits of the board. The circuits of the multilayered circuit board are produced by a printing or an electrolytic plating method or an electroless plating method.
Inventors
- 👤 Utami Soma
- 👤 Yasufumi Koseki
- 👤 Minoru Asakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:47
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0216; H05K1/0218; G; G03; G03G; G03G15/00; G03G15/50; H05K1/0296; H05K1/0298; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2201/09; H05K2201/09209; H05K2201/0929; H05K2201/09327; H05K2201/10; H05K2201/10431; H05K2201/10553; H05K2201/10613; H05K2201/10621; H05K2201/10689
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
An arrangement for mounting a CPU for controlling an image processing apparatus, the arrangement comprising: a base, the base having a first side including a first surface, and a second side which is opposite to the first side, a CPU being mounted on the base and being located on the first side of the base in proximity to the first surface; a plurality of circuit layers located on the second side of the base; at least one insulating layer located between each of the circuit layers; and means comprising a shield layer for shielding the CPU from at least one of the electromagnetic noise and electrostatic noise.
Claim 2
Dependent Claim
107 words
An arrangement for mounting a CPU for controlling an image processing apparatus, the arrangement comprising: a base, the base having a first side including a first surface, and a second side which is opposite to the first side, a CPU being mounted on the base and being located on the first side of the base in proximity to the first surface; a plurality of circuit layers located on the second side of the base; at least one insulating layer located between each of the circuit layers; and means comprising a shield layer for shielding the CPU from at least one of the electromagnetic noise and electrostatic noise.
Claim 3
Dependent Claim
15 words
The arrangement of claim 1, wherein the shielding means is unconnected to the circuit layers.
Claim 4
Dependent Claim
11 words
The arrangement of claim 1, wherein the shielding means is grounded.
Claim 5
Dependent Claim
17 words
The arrangement of claim 1, wherein the base and the shield layer are substantially parallel planar surfaces.
Claim 6
Dependent Claim
17 words
The arrangement of claim 1, wherein the shield layer is on the first surface of the base.
Claim 7
Dependent Claim
34 words
The arrangement of claim 1, wherein the shield layer is between the base and the plurality of circuit layers, and a second base is between the shield layer and the plurality of circuit layers.
Claim 8
Dependent Claim
18 words
The arrangement of claim 1, wherein the shield layer is between two adjacent ones of the circuit layers.
Claim 9
Dependent Claim
19 words
The arrangement of claim 1, wherein the plurality of circuit layers is between the base and the shield layer.
Claim 10
Dependent Claim
102 words
A circuit board for mounting a component, the circuit board comprising: a base, the base having a first side including a first surface, and a second side which is opposite to the first side, a component being mounted on the base and being located on the first side of the base in proximity to the first surface; a plurality of circuit layers located on the second side of the base; at least one insulating layer located between each of the circuit layers; and means comprising a shield layer for shielding the component from at least one of electromagnetic noise and electrostatic noise.
Claim 11
Dependent Claim
102 words
A circuit board for mounting a component, the circuit board comprising: a base, the base having a first side including a first surface, and a second side which is opposite to the first side, a component being mounted on the base and being located on the first side of the base in proximity to the first surface; a plurality of circuit layers located on the second side of the base; at least one insulating layer located between each of the circuit layers; and means comprising a shield layer for shielding the component from at least one of electromagnetic noise and electrostatic noise.
Claim 12
Dependent Claim
16 words
The circuit board of claim 9, wherein the shielding means is unconnected to the circuit layers.
Claim 13
Dependent Claim
12 words
The circuit board of claim 9, wherein the shielding means is grounded.
Claim 14
Dependent Claim
18 words
The circuit board of claim 9, wherein the abase and the shield layer are substantially parallel planar surfaces.
Claim 15
Dependent Claim
18 words
The circuit board of claim 9, wherein the shield layer is on the first surface of the base.
Claim 16
Dependent Claim
35 words
The circuit board of claim 9, wherein the shield layer is between the base and the plurality of circuit layers, and a second base is between the shield layer and the plurality of circuit layers.
Claim 17
Dependent Claim
19 words
The circuit board of claim 9, wherein the shield layer is between two adjacent ones of the circuit layers.
Claim 18
Dependent Claim
20 words
The circuit board of claim 9, wherein the plurality of circuit layers is between the base and the shield layer.
References Cited (Backward Citations)
US3680005A
Cited
US3417294A
Cited
GB2039153A
Cited
US4554405A
Cited
US4498122A
Cited
US4754371A
Cited
US4675788A
Cited
US4743710A
Cited
US4801489A
Cited
US4816616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |