An apparatus for treating a sample comprises an ion source for irradiating a designated area of the sample with a focused ion beam, a vessel for storing compound to be vaporized, a heater surrounding the vessel for heating the compound to vaporize the same inside the vessel to produce compound vapor, and a nozzle for directing the compound vapor in the form of a vapor stream onto the designated area of the sample being irradiated with the focused ion beam. A valve is disposed along the fluid communication path between the vessel and the nozzle and has a closed state for blocking the flow of compound vapor through the nozzle and an open state for permitting the flow of compound vapor through the nozzle. The apparatus can be used to form pattern films on substrates, to repair defects in photo-masks and X-ray masks, and to cut or connect wiring in integrated circuits.

FIELD OF TECHNOLOGY 
The present invention relates to a mask-repairing device for use in 
repairing defects, such as an insufficiently formed film, or an unwanted 
excessively formed film, in masks utilized in semiconductor manufacturing, 
or for use in repairing disconnected or unconnected wiring, and 
short-circuit patterns, of the semiconductor device itself. 
BACKGROUND TECHNOLOGY 
A method of forming a pattern film at a target position by discharging an 
ion beam to a predetermined position on the sample in an atmosphere where 
compound vapor exists, in presently receiving attention as a repairing 
method for semiconductors and masks. As a method to supply the compound 
vapor to the target position on the sample, the Knudsen cell method 
described in "New Course 2 of Experimental Chemistry" published by 
Maruzen, Nov. 20, 1978, pages 371 to 379, is being utilized. As shown in 
FIG. 4, a Knudsen cell 52, in which compound 51 is stored inside, is 
heated by heater 53 provided on the outer circumferential portion, and the 
compound evaporated by the heating is ejected through an orifice 54. As 
shown, a thermo couple 55 is provided on the Knudsen cell 52 so that it is 
possible to control the heating temperature with a temperature controller, 
and to control the ejection amount of the compound vapor. 
Also, as a similar method to form a pattern film utilizing the reaction 
between a charged particle beam and a chemical compound, the following 
method has been proposed in the draft manuscript of a lecture on "The 
Injection of Ions and the Processing of Submicrons" of the 15th symposium 
held in the Physico Chemical Research Institute. In this method, which is 
described in FIG. 5, the compound vapor 56 is supplied to a sub-sample 
chamber 58 provided within a sample chamber 57, and then an electron beam 
60 discharged from an electron gun 59 is applied to the sample 56 through 
a small bore 61 provided in sub-sample chamber 58. 
In the method described in FIG. 4, the compound vapor ejected from the 
orifice 54 fans out and spreads in a broad area without any directional 
characteristics. In general, the region to which the charged particle beam 
is applied to form the pattern film is smaller than 1.times.1 mm. 
Therefore, the compound vapor directed to anywhere beyond the target 
position is wasted, and causes various disadvantages. For example, when 
the compound adheres to undesired areas, the quantity of compound vapor 
supplied to the intended area at which the pattern film is to be formed 
may change as time passes, or when a charged particle beam such as an ion 
beam is utilized, it may cause deterioration of the series (for example, 
the life span of the ion source is reduced), as the compound adheres to 
the charged particle beam series. 
Also, in the method described in FIG. 5, as it utilizes a sub-sample 
chamber inside the sample chamber, the driving mechanism for positioning 
the sample is complicated, and it is difficult to detect the defects of 
the mask. Furthermore, the following three mechanisms are required for a 
mask-repairing device that utilizes ion beam: a defect repairing mechanism 
which forms a thin film by the reaction between the compound vapor and the 
ion beam; a defect repairing mechanism which removes an unnecessary thin 
film by ion beam sputtering; and a sample surface detecting mechanism 
which utilizes secondary charged particles. Therefore, at the time of 
repairing an insufficiently formed film, the compound vapor is guided into 
the sub-sample chamber, but at the time of removing an unwanted portion of 
a formed film, the partial pressure of the vapor inside the sub-sample 
chamber must be sufficiently low to enable effective sputtering. 
Consequently, the mask-repairing device utilizing the sub-sample chamber 
has the disadvantage that it takes to much time in controlling the ON-OFF 
condition of the compound vapor. 
The present invention has been devised to solve the above problems, and one 
object of the invention is to provide a mask-repairing device that easily 
controls the ON-OFF conditions of the ejection of the compound vapor by 
applying the vapor directionally without polluting unnecessary areas. 
Also, another object of the present invention is to provide a 
mask-repairing device that can form a thin film not only on a flat portion 
of the sample but also on a recessed portion of the sample which is 
adjacent to the pattern, with the same conditions. 
Furthermore, another object of the present invention is to provide a 
mask-repairing device that reduces the ejection amount of the compound 
vapor to prevent the inside of the sample chamber from being polluted and 
to prolong the life span of the ion source. 
Further still, an object of the present invention is to provide a 
mask-repairing device where, by providing an interlock circuit, the 
contact between the nozzle tip and the sample palette guard is prevented, 
and the reliability of the device is improved. 
SUMMARY OF THE INVENTION 
The mask-repairing device of the present invention is comprised of a 
compound vessel which evaporates the compound, a thin tube-like nozzle 
connected to the compound vessel, and a valve body which turns the 
connection between the compound vessel and the nozzle in an open or closed 
condition so as to apply compound vapor directionally, without polluting 
unnecessary areas, and to control the ON-OFF conditions of the ejection of 
the compound. 
Also, the mask-repairing device of the present invention can form a thin 
film on a flat portion and also on a recessed portion adjacent to the 
pattern, with the same conditions, by arranging several compound vapor 
ejecting nozzles around the fixed ion beam emitting position. 
Furthermore, the mask-repairing device of the present invention optionally 
enables the backward and forward movements of the compound vapor-ejecting 
nozzle, and, by bringing the tip of the nozzle close to desired position, 
the ejection amount of the compound vapor is reduced, pollution inside the 
sample chamber is prevented, and thus the life span of the ion source is 
prolonged. 
Further still, by providing an inter-lock circuit which enables the opening 
and closing of the gate valve between the driving of the sample base and 
the sub-sample chamber only when the tip of the vapor-ejecting nozzle is 
moved backwardly from the fixed position, the contact between the nozzle 
tip and the sample palette guard can be prevented.

DETAILED DESCRIPTION OF THE INVENTION 
An explanation of the present invention will now be given referring to the 
drawings. 
Embodiment 1 
FIG. 1 is a main sectional diagram of embodiment 1. Referring to FIG. 1, 
compound vessel 12 stores compound 1 inside. A valve body is disposed 
within the vessel 12 and comprises a guide tube 13 which defines a 
compound vapor guide hole 13' and a plunger 14 for opening and closing the 
hole 13'. The compound vapor guide hole 13' communicates at its lower end 
with a nozzle 22. As shown in FIG. 1, when the plunger 14 seats tightly on 
the guide tube 13 to close the compound vapor guide hole 13', the valve 
body is in a closed condition, and when the plunger 14 moves axially 
upwardly to open the hole 13' so that a gap occurs between the plunger 14 
and the end surface of the guide tube 13, the valve body is in an open 
condition. The movement of the plunger 14 is conducted by a cylinder 15 
through a rod 16, the cylinder 15 being retained by a cylinder mounting 
board 18. A valve bearing 19 guides the axial movement of rod 16. 
When the valve body is in the closed condition, the compound 1 is enclosed 
and confined within the compound vessel 12. Seal material 20 and an O-ring 
21 seal the top part of the compound vessel 12 to create a vacuum therein, 
whereas the space above the seal material 20 is open to the atmosphere. 
The thin tube-like nozzle 22 is designed to eject the vapor of the 
compound 1 in a beam form. A heater in the form of a heating coil 23 
encircles the vessel 12 to uniformly heat and vaporize the compound 1. 
Thermo couple 24 detects the temperature of vessel 12. A feed through 
connector 25 is connected to the heating coil 23 and thermo couple 24 and 
leads to a point outside the vacuum vessel for connection to a temperature 
controller (not shown). Insulator 26 insulates feed through connector 25 
from a retention body 17. The overall vacuum vessel is sealed to the 
retention body 17 by an O-ring 28, and the nozzle 22 thus forms part of 
the inner part of the vacuum vessel 27. 
Next, an explanation will be given of the embodiment of compound vapor 
ejection device shown in FIG. 1. The pressure within the vacuum vessel 27 
is maintained at a value less than 1.times.10.sup.-5 Torr. In this 
example, the compound 1 is phenanthrene. When the vessel 12 is heated to 
80.degree. C., the pressure inside of vessel 12 becomes approximately 0.16 
Torr because of the formation of phenanthrene vapor. When the vapor body 
is opened at this point, the phenanthrene vapor is ejected through the 
nozzle 22 in the form of a thin beam. The size and the ejection amount of 
the vapor beam are determined by the diameter and the length of the nozzle 
22, as described in J. Appl. Phys. 41 (1970) 2769-2776 of Olander and 
Kruger. 
As stated above, when the compound vapor ejection device of embodiment 1 of 
the present invention is utilized, compound vapor at low vapor pressure is 
controllably ejected, and thus unnecessary areas are not polluted. Also, 
it is possible to control easily the ejection amount of the compound 
vapor. Furthermore, the ion source does not become polluted, and thus the 
life span of the ion source can be prolonged. 
Embodiment 2 
FIG. 2 is a general sectional diagram of embodiment 2. An ion beam 32 
ejected from an ion source 31 is directed to the surface of a sample 36, 
mounted on a sample stage 35, by a focusing lens 34 of an ion beam 
ejection series 33. The positions of defects in the sample 36 are detected 
in advance by a defect detecting device, and the sample 36 is moved to the 
desired target position by driving the sample stage 35. The form and the 
position of the defects can be examined by examining the surface of the 
mask by scanning the ion beam 32 in a known manner. The form of the defect 
is input into an ion beam control device, and the defect of the mask is 
repaired by scanning the ion beam. 
When the defect is in the nature of an insufficiently formed film defect, 
it is repaired by forming a thin film by the reaction between the compound 
vapor and ion beam. This reaction occurs after the compound vapor from a 
compound vapor supply device 37, which is composed of a compound vessel 12 
and heater 23 such as shown in FIG. 1, is sprayed by nozzle 22 through a 
valve body 38 to the ion beam target position. If desired, a plurality of 
nozzles 22 can be provided around the ion beam target position, or mounted 
oppositely with respect to the ion beam target position, and by using 
several nozzles 22, it is possible to spray the compound vapor 
simultaneously to the ion beam target position. 
On the other hand, when the defect is in the nature of an unwanted film 
defect which must be removed, it is repaired by sputtering using the ion 
beam. During this kind of repair, the supply of the compound vapor is cut 
off by closing the valve body 38. 
According to embodiment 2, as the vapor is ejected to a predetermined 
position by several nozzles, not only the flat portion of the mask 
pattern, but also the shade portions caused by the concave-convex shape of 
the pattern, can be reliably repaired. This embodiment also makes it 
possible to form a thin film with a small ejection amount of the compound 
vapor. Therefore, pollution inside the sample chamber is reduced, and the 
life span of the ion source is prolonged. 
Embodiment 3 
FIG. 2 is a general sectional diagram of embodiment 3, and FIG. 3 is a 
partial sectional diagram of embodiment 3. 
In FIG. 3, the parts of the apparatus for forming a thin film on the 
insufficiently formed film of the mask pattern, and for removing an 
unwanted film, an omitted, as they have heretofore been explained in 
embodiment 2. Referring briefly to FIG. 2, the sample chamber 39 and 
sub-chamber 40 of the mask-repairing device of the present embodiment are 
evacuated by vacuum pumps 41. Sample 36 can be taken in and out of the 
sample chamber 39 by the opening and closing of a gate valve 45. 
As the compound vapor ejection device emits compound vapor in the form of a 
beam from the thin nozzle 22, the total amount of the compound vapor can 
be reduced. FIG. 3 shows an example of the compound vapor ejection device. 
Nozzle 22 supplies compound vapor to the defect position on the sample 36. 
Compound vessel 12 heats and vaporizes the compound 1, and the compound 
vapor is led through and discharged from the nozzle 22. The tip portion of 
the nozzle 22 is connected to a cylinder 15. By driving the cylinder 15, 
the tip of the nozzle 22 of the compound vapor ejection device moves 
backwards and forwards. When the tip of the nozzle 22 moves forwards, a 
stopper 42 which is secured to the nozzle 22 strikes a mounting plate 18 
thereby restricting the extent of forward displacement of the nozzle 22. 
The distance between the tip of nozzle 22 and the sample 36, at this 
point, is fixed at the most suitable distance, and the repairing of the 
mask defects can be achieved using a small amount of compound vapor. 
When the nozzle moves backwards, after it has moved a predetermined amount, 
the communication between the compound vessel 12 and nozzle 22 is cut off, 
and the ejection of compound vapor is interrupted. At the same time, the 
stopper 42 actuates a micro switch 43 which produces a signal to initiate 
driving of the sample base 44 which, up to this point, has been locked in 
position. Also, the opening and closing of the gate valve 45 between the 
sample chamber 39 and the sub-sample chamber 40 is then carried out. 
Therefore, according to this embodiment, the taking in and out of the 
sample 36 can be done only when the tip of the nozzle 22 has moved 
backwards. Thus accidents can be prevented. For example, conventionally, 
the nozzle 22 and such would likely be damaged by contact between the tip 
of nozzle 22 and the sample guard 47 whereas such damage is prevented by 
the present invention. Also, according to this embodiment, the tip of the 
nozzle 22 can be brought very close to the sample 36, so that the amount 
of the compound vapor ejected from the nozzle 22 can be limited to a 
minimum quantity. As a consequence, the load of the vacuum exhaust system 
and the pollution within the sample chamber 39 is reduced and the life 
span of the ion source is prolonged. In the explanation of FIG. 3, the 
compound vessel 12 is provided inside the sample chamber 39, but to enable 
easier replacement of the compound, the compound vessel 12 can be provided 
on the outside of sample chamber 39 as in FIG. 2. 
UTILIZATION POSSIBILITY IN INDUSTRY 
As stated above, with the present invention, in repairing defects such as 
insufficiently formed film and unwanted film in semiconductor 
manufacturing, the ejection amount of compound vapor, and its ON-OFF 
conditions can easily be controlled, the vapor ejection amount can be 
reduced, the operation of the repairing of mask defect is improved, and 
the pollution inside the sample chamber is prevented, and thus a 
mask-repairing device with an ion source having a long life span can be 
obtained. Also, as the contact between the nozzle tip and sample mask as 
such is prevented, the reliability of the device itself is improved. 
Also, as it is possible to conduct the examination to locate the defect 
position of the mask and the repairing of the insufficient and unwanted 
film defects with one device, the repairing of the mask can be done 
accurately and speedily. Moreover, the mask-repairing device of the 
present invention can be utilized not only for repairing photo-masks and 
X-rays masks, but can also be utilized for connecting and cutting the 
wiring of super LSI.